Practice Python Exercises

Exercise 1: Hello, World!

Write a Python program that prints “Hello, World!” to the console.

# Exercise 1: Hello, World!

# Print "Hello, World!"
print("Hello, World!")

Exercise 2: Sum of Two Numbers

Write a Python program that calculates and prints the sum of two numbers.

Show Solution

# Exercise 2: Sum of Two Numbers

# Define two numbers
num1 = 5
num2 = 3

# Calculate the sum
sum = num1 + num2

# Print the sum
print("The sum of", num1, "and", num2, "is:", sum)

Exercise 3: Area of a Rectangle

Write a Python program that calculates and prints the area of a rectangle given its length and width.

Show Solution

# Exercise 3: Area of a Rectangle

# Define the length and width of the rectangle
length = 6
width = 4

# Calculate the area
area = length * width

# Print the area
print("The area of the rectangle is:", area)

Exercise 4: Celsius to Fahrenheit Conversion

Write a Python program that converts a temperature in Celsius to Fahrenheit.

Show Solution

# Exercise 4: Celsius to Fahrenheit Conversion

# Input temperature in Celsius
celsius = 20

# Convert Celsius to Fahrenheit
fahrenheit = (celsius * 9/5) + 32

# Print the result
print("Temperature in Fahrenheit:", fahrenheit)

Exercise 5: Maximum of Three Numbers

Write a Python program that finds and prints the maximum of three numbers.

Show Solution

# Exercise 5: Maximum of Three Numbers

# Define three numbers
num1 = 10
num2 = 20
num3 = 15

# Find the maximum
max_num = max(num1, num2, num3)

# Print the maximum
print("The maximum of the three numbers is:", max_num)

Exercise 6: Factorial Calculation

Write a Python program that calculates and prints the factorial of a given number.

Show Solution

# Exercise 6: Factorial Calculation

# Function to calculate factorial
def factorial(n):
    if n == 0:
        return 1
    else:
        return n * factorial(n - 1)

# Input number
num = 5

# Calculate factorial
result = factorial(num)

# Print the result
print("Factorial of", num, "is:", result)

Exercise 7: Simple Interest Calculation

Write a Python program that calculates and prints the simple interest given the principal amount, rate, and time.

Show Solution

# Exercise 7: Simple Interest Calculation

# Input principal amount, rate, and time
principal = 1000
rate = 0.05
time = 2

# Calculate simple interest
simple_interest = principal * rate * time

# Print the result
print("Simple interest:", simple_interest)

Exercise 8: Reverse a String

Write a Python program that reverses a given string.

Show Solution

# Exercise 8: Reverse a String

# Input string
string = "hello"

# Reverse the string
reversed_string = string[::-1]

# Print the reversed string
print("Reversed string:", reversed_string)

Exercise 9: Check for Palindrome

Write a Python program that checks if a given string is a palindrome.

Show Solution

# Exercise 9: Check for Palindrome

# Input string
string = "radar"

# Check if the string is a palindrome
if string == string[::-1]:
    print("The string is a palindrome.")
else:
    print("The string is not a palindrome.")

Exercise 10: Count Vowels in a String

Write a Python program that counts and prints the number of vowels in a given string.

Show Solution

# Exercise 10: Count Vowels in a String

# Input string
string = "hello world"

# Count vowels
vowels = "aeiou"
count = sum(1 for char in string if char.lower() in vowels)

# Print the count
print("Number of vowels:", count)

Exercise 11: Check Leap Year

Write a Python program that checks if a given year is a leap year.

Show Solution

# Exercise 11: Check Leap Year

# Input year
year = 2024

# Check if the year is a leap year
if (year % 4 == 0 and year % 100 != 0) or (year % 400 == 0):
    print(year, "is a leap year.")
else:
    print(year, "is not a leap year.")

Exercise 12: Fibonacci Series

Write a Python program to generate the Fibonacci series up to a specified number of terms.

Show Solution

# Exercise 12: Fibonacci Series

# Function to generate Fibonacci series
def fibonacci(n):
    fib_series = [0, 1]
    for i in range(2, n):
        next_term = fib_series[-1] + fib_series[-2]
        fib_series.append(next_term)
    return fib_series

# Input number of terms
terms = 10

# Generate Fibonacci series
series = fibonacci(terms)

# Print the series
print("Fibonacci Series:", series)

Exercise 13: Prime Number Check

Write a Python program that checks if a given number is a prime number.

Show Solution

# Exercise 13: Prime Number Check

# Input number
num = 17

# Check if the number is prime
is_prime = True
if num <= 1:
    is_prime = False
else:
    for i in range(2, int(num**0.5) + 1):
        if num % i == 0:
            is_prime = False
            break

# Print the result
if is_prime:
    print(num, "is a prime number.")
else:
    print(num, "is not a prime number.")

Exercise 14: Count Words in a String

Write a Python program that counts and prints the number of words in a given string.

Show Solution

# Exercise 14: Count Words in a String

# Input string
string = "Hello, how are you?"

# Count words
word_count = len(string.split())

# Print the count
print("Number of words:", word_count)

Exercise 15: Sum of Digits

Write a Python program that calculates and prints the sum of digits of a given number.

Show Solution

# Exercise 15: Sum of Digits

# Input number
num = 12345

# Calculate sum of digits
digit_sum = sum(int(digit) for digit in str(num))

# Print the sum
print("Sum of digits:", digit_sum)

Exercise 16: Calculate BMI

Write a Python program that calculates the Body Mass Index (BMI) given the height (in meters) and weight (in kilograms) of a person.

Show Solution

# Exercise 16: Calculate BMI

# Input height and weight
height = 1.75
weight = 70

# Calculate BMI
bmi = weight / (height ** 2)

# Print the BMI
print("BMI:", bmi)

Exercise 17: Count Even and Odd Numbers

Write a Python program that counts and prints the number of even and odd numbers in a given list of integers.

Show Solution

# Exercise 17: Count Even and Odd Numbers

# Input list of numbers
numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9]

# Count even and odd numbers
even_count = sum(1 for num in numbers if num % 2 == 0)
odd_count = len(numbers) - even_count

# Print the counts
print("Number of even numbers:", even_count)
print("Number of odd numbers:", odd_count)

Exercise 18: Remove Duplicates from a List

Write a Python program that removes duplicates from a given list and prints the updated list.

Show Solution

# Exercise 18: Remove Duplicates from a List

# Input list with duplicates
numbers = [1, 2, 2, 3, 4, 4, 5, 6, 6]

# Remove duplicates
unique_numbers = list(set(numbers))

# Print the updated list
print("List with duplicates removed:", unique_numbers)

Exercise 19: Check Anagram

Write a Python program that checks if two given strings are anagrams.

Show Solution

# Exercise 19: Check Anagram

# Input strings
str1 = "listen"
str2 = "silent"

# Check if the strings are anagrams
is_anagram = sorted(str1) == sorted(str2)

# Print the result
if is_anagram:
    print("The strings are anagrams.")
else:
    print("The strings are not anagrams.")

Exercise 20: Find Largest Element in a List

Write a Python program that finds and prints the largest element in a given list of numbers.

Show Solution

# Exercise 20: Find Largest Element in a List

# Input list of numbers
numbers = [10, 5, 20, 15, 30]

# Find the largest element
max_num = max(numbers)

# Print the largest element
print("Largest element:", max_num)

Exercise 21: Check Armstrong Number

Write a Python program that checks if a given number is an Armstrong number.

Show Solution

# Exercise 21: Check Armstrong Number

# Input number
num = 153

# Calculate the sum of cubes of digits
temp = num
sum = 0
while temp > 0:
    digit = temp % 10
    sum += digit ** 3
    temp //= 10

# Check if the number is an Armstrong number
is_armstrong = num == sum

# Print the result
if is_armstrong:
    print(num, "is an Armstrong number.")
else:
    print(num, "is not an Armstrong number.")

Exercise 22: Check Palindrome Number

Write a Python program that checks if a given number is a palindrome number.

Show Solution

# Exercise 22: Check Palindrome Number

# Input number
num = 12321

# Convert the number to a string
num_str = str(num)

# Check if the number is a palindrome
is_palindrome = num_str == num_str[::-1]

# Print the result
if is_palindrome:
    print(num, "is a palindrome number.")
else:
    print(num, "is not a palindrome number.")

Exercise 23: Sort Words in Alphabetical Order

Write a Python program that takes a list of words and sorts them in alphabetical order.

Show Solution

# Exercise 23: Sort Words in Alphabetical Order

# Input list of words
words = ["apple", "banana", "orange", "grape", "pineapple"]

# Sort the words
sorted_words = sorted(words)

# Print the sorted words
print("Words in alphabetical order:", sorted_words)

Exercise 24: Merge Two Lists

Write a Python program that merges two given lists into a single list and removes duplicates.

Show Solution

# Exercise 24: Merge Two Lists

# Input lists
list1 = [1, 2, 3, 4, 5]
list2 = [4, 5, 6, 7, 8]

# Merge and remove duplicates
merged_list = list(set(list1 + list2))

# Print the merged list
print("Merged list without duplicates:", merged_list)

Exercise 25: Count Frequency of Characters in a String

Write a Python program that counts the frequency of each character in a given string.

Show Solution

# Exercise 25: Count Frequency of Characters in a String

# Input string
string = "hello"

# Count frequency of characters
char_frequency = {}
for char in string:
    char_frequency[char] = char_frequency.get(char, 0) + 1

# Print the frequency of characters
for char, freq in char_frequency.items():
    print(char, ":", freq)

Exercise 26: Find Second Largest Element in a List

Write a Python program that finds and prints the second largest element in a given list of numbers.

Show Solution

# Exercise 26: Find Second Largest Element in a List

# Input list of numbers
numbers = [10, 20, 30, 40, 50]

# Find the second largest element
second_largest = sorted(set(numbers))[-2]

# Print the second largest element
print("Second largest element:", second_largest)

Exercise 27: Merge Sort Algorithm

Write a Python program that implements the merge sort algorithm to sort a given list of numbers.

Show Solution

# Exercise 27: Merge Sort Algorithm

# Function to merge two sorted lists
def merge(left, right):
    result = []
    i = j = 0
    while i < len(left) and j < len(right):
        if left[i] < right[j]:
            result.append(left[i])
            i += 1
        else:
            result.append(right[j])
            j += 1
    result.extend(left[i:])
    result.extend(right[j:])
    return result

# Function to perform merge sort
def merge_sort(nums):
    if len(nums) <= 1:
        return nums
    mid = len(nums) // 2
    left = merge_sort(nums[:mid])
    right = merge_sort(nums[mid:])
    return merge(left, right)

# Input list of numbers
numbers = [5, 3, 8, 1, 9, 2, 7, 6, 4]

# Sort the list using merge sort
sorted_numbers = merge_sort(numbers)

# Print the sorted list
print("Sorted list:", sorted_numbers)

Exercise 28: Reverse Words in a String

Write a Python program that reverses the order of words in a given string.

Show Solution

# Exercise 28: Reverse Words in a String

# Input string
string = "Hello World"

# Reverse the order of words
reversed_string = " ".join(string.split()[::-1])

# Print the reversed string
print(“Reversed string:”, reversed_string)

Exercise 29: Find Missing Number

Write a Python program that finds and prints the missing number in a given list of consecutive numbers from 1 to N.

Show Solution

# Exercise 29: Find Missing Number

# Input list of numbers
numbers = [1, 2, 3, 4, 6, 7, 8, 9, 10]

# Find the missing number
n = len(numbers) + 1
missing_number = (n * (n + 1) // 2) - sum(numbers)

# Print the missing number
print("Missing number:", missing_number)

Exercise 30: Remove Punctuation from a String

Write a Python program that removes punctuation characters from a given string.

Show Solution

# Exercise 30: Remove Punctuation from a String

# Import string module for accessing punctuation characters
import string

# Input string
string_with_punctuation = "Hello, World! This is a sample string."

# Remove punctuation
clean_string = string_with_punctuation.translate(str.maketrans("", "", string.punctuation))

# Print the cleaned string
print("Cleaned string:", clean_string)

Exercise 31: Calculate Power of a Number

Write a Python program that calculates and prints the power of a given number raised to another number.

Show Solution

# Exercise 31: Calculate Power of a Number

# Input base and exponent
base = 2
exponent = 5

# Calculate power
power = base ** exponent

# Print the result
print(“Power of”, base, “raised to”, exponent, “is:”, power)

Exercise 32: Check Strong Number

Write a Python program that checks if a given number is a strong number.

Show Solution

# Exercise 32: Check Strong Number

# Function to calculate factorial of a number
def factorial(n):
    if n == 0:
        return 1
    else:
        return n * factorial(n - 1)

# Input number
num = 145

# Calculate the sum of factorials of digits
temp = num
sum = 0
while temp > 0:
    digit = temp % 10
    sum += factorial(digit)
    temp //= 10

# Check if the number is a strong number
is_strong = num == sum

# Print the result
if is_strong:
    print(num, "is a strong number.")
else:
    print(num, "is not a strong number.")

Exercise 33: Find Median of Two Sorted Lists

Write a Python program that finds the median of two sorted lists.

Show Solution

# Exercise 33: Find Median of Two Sorted Lists

# Input sorted lists
list1 = [1, 3, 5]
list2 = [2, 4, 6]

# Merge the lists
merged_list = sorted(list1 + list2)

# Calculate median
n = len(merged_list)
if n % 2 == 0:
    median = (merged_list[n//2 - 1] + merged_list[n//2]) / 2
else:
    median = merged_list[n//2]

# Print the median
print("Median of the two lists:", median)

Exercise 34: Convert Decimal to Binary

Write a Python program that converts a decimal number to its binary representation.

Solution:

Show Solution

# Exercise 34: Convert Decimal to Binary

# Input decimal number
decimal = 10

# Convert decimal to binary
binary = bin(decimal)[2:]

# Print the binary representation
print("Binary representation of", decimal, "is:", binary)

Exercise 35: Generate Random Password

Write a Python program that generates a random password of a specified length.

Show Solution

# Exercise 35: Generate Random Password

# Import random module
import random

# Define characters for password generation
characters = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789!@#$%^&*"

# Input password length
length = 10

# Generate random password
password = "".join(random.sample(characters, length))

# Print the password
print("Random password:", password)

Exercise 36: Find GCD of Two Numbers

Write a Python program that finds and prints the Greatest Common Divisor (GCD) of two given numbers.

Show Solution

# Exercise 36: Find GCD of Two Numbers

# Function to calculate GCD using Euclid's algorithm
def gcd(a, b):
    while b:
        a, b = b, a % b
    return a

# Input numbers
num1 = 24
num2 = 36

# Find and print the GCD
print("GCD of", num1, "and", num2, "is:", gcd(num1, num2))

Exercise 37: Find LCM of Two Numbers

Write a Python program that finds and prints the Least Common Multiple (LCM) of two given numbers.

Show Solution

# Exercise 37: Find LCM of Two Numbers

# Function to calculate LCM
def lcm(a, b):
    return (a * b) // gcd(a, b)

# Input numbers
num1 = 24
num2 = 36

# Find and print the LCM
print("LCM of", num1, "and", num2, "is:", lcm(num1, num2))

Exercise 38: Generate Random Numbers

Write a Python program that generates a specified number of random numbers within a given range.

Show Solution

# Exercise 38: Generate Random Numbers

# Import random module
import random

# Input parameters
start = 1
end = 100
count = 5

# Generate random numbers
random_numbers = [random.randint(start, end) for _ in range(count)]

# Print the random numbers
print("Random numbers:", random_numbers)

Exercise 39: Find Square Root

Write a Python program that finds and prints the square root of a given number.

Show Solution

# Exercise 39: Find Square Root

# Import math module
import math

# Input number
num = 25

# Find and print the square root
print("Square root of", num, "is:", math.sqrt(num))

Exercise 40: Calculate Compound Interest

Write a Python program that calculates and prints the compound interest given the principal amount, rate, and time.

Show Solution

# Exercise 40: Calculate Compound Interest

# Input principal amount, rate, and time
principal = 1000
rate = 0.05
time = 2

# Calculate compound interest
compound_interest = principal * ((1 + rate) ** time - 1)

# Print the compound interest
print("Compound interest:", compound_interest)

Exercise 42: Find Factorial of a Number

Write a Python program that finds and prints the factorial of a given number.

Show Solution

# Exercise 42: Find Factorial of a Number

# Input number
num = 5

# Function to calculate factorial
def factorial(n):
    if n == 0:
        return 1
    else:
        return n * factorial(n - 1)

# Calculate factorial
fact = factorial(num)

# Print the factorial
print("Factorial of", num, "is:", fact)

Exercise 43: Check Disarium Number

Write a Python program that checks if a given number is a Disarium number.

Show Solution

# Exercise 43: Check Disarium Number

# Input number
num = 89

# Function to calculate the sum of digits raised to their respective positions
def calculate_disarium_sum(n):
    digit_count = len(str(n))
    temp = n
    sum = 0
    while temp > 0:
        digit = temp % 10
        sum += digit ** digit_count
        temp //= 10
        digit_count -= 1
    return sum

# Check if the number is a Disarium number
is_disarium = num == calculate_disarium_sum(num)

# Print the result
if is_disarium:
    print(num, "is a Disarium number.")
else:
    print(num, "is not a Disarium number.")

Exercise 44: Calculate Natural Logarithm

Write a Python program that calculates and prints the natural logarithm of a given number.

Show Solution

# Exercise 44: Calculate Natural Logarithm

# Import math module
import math

# Input number
num = 2.71828

# Calculate natural logarithm
log_value = math.log(num)

# Print the natural logarithm
print("Natural logarithm of", num, "is:", log_value)

Exercise 45: Generate Pascal’s Triangle

Write a Python program that generates and prints Pascal’s triangle up to a specified number of rows.

Show Solution

# Exercise 45: Generate Pascal's Triangle

# Function to generate Pascal's triangle
def generate_pascals_triangle(rows):
    triangle = []
    for i in range(rows):
        row = [1]
        if triangle:
            last_row = triangle[-1]
            row.extend([sum(pair) for pair in zip(last_row, last_row[1:])])
            row.append(1)
        triangle.append(row)
    return triangle

# Input number of rows
num_rows = 5

# Generate Pascal's triangle
pascals_triangle = generate_pascals_triangle(num_rows)

# Print the triangle
print("Pascal's Triangle:")
for row in pascals_triangle:
    print(row)

Exercise 46: Count Vowels and Consonants

Write a Python program that counts and prints the number of vowels and consonants in a given string.

Show Solution

# Exercise 46: Count Vowels and Consonants

# Input string
string = "Hello World"

# Function to count vowels and consonants
def count_vowels_and_consonants(s):
    vowels = 0
    consonants = 0
    for char in s:
        if char.lower() in 'aeiou':
            vowels += 1
        elif char.isalpha():
            consonants += 1
    return vowels, consonants

# Count vowels and consonants
vowel_count, consonant_count = count_vowels_and_consonants(string)

# Print the counts
print("Number of vowels:", vowel_count)
print("Number of consonants:", consonant_count)

Exercise 47: Check Harshad Number

Write a Python program that checks if a given number is a Harshad number.

Show Solution

# Exercise 47: Check Harshad Number

# Input number
num = 18

# Function to calculate sum of digits
def sum_of_digits(n):
    return sum(int(digit) for digit in str(n))

# Check if the number is a Harshad number
is_harshad = num % sum_of_digits(num) == 0

# Print the result
if is_harshad:
    print(num, "is a Harshad number.")
else:
    print(num, "is not a Harshad number.")

Exercise 48: Check Duck Number

Write a Python program that checks if a given number is a Duck number.

Show Solution

# Exercise 48: Check Duck Number

# Input number
num = 503

# Check if the number is a Duck number
is_duck = '0' in str(num)[1:]

# Print the result
if is_duck:
    print(num, "is a Duck number.")
else:
    print(num, "is not a Duck number.")

Exercise 49: Convert Octal to Decimal

Write a Python program that converts an octal number to its decimal representation.

Show Solution

# Exercise 49: Convert Octal to Decimal

# Input octal number
octal = '52'

# Convert octal to decimal
decimal = int(octal, 8)

# Print the decimal representation
print("Decimal representation of", octal, "is:", decimal)

Exercise 50: Find Fibonacci Series

Write a Python program that generates and prints the Fibonacci series up to a specified number of terms.

Show Solution

# Exercise 50: Find Fibonacci Series

# Input number of terms
terms = 10

# Initialize first two terms
a, b = 0, 1

# Print Fibonacci series
print("Fibonacci Series:")
for _ in range(terms):
    print(a, end=" ")
    a,

Exercise 51: Check Perfect Number

Write a Python program that checks if a given number is a perfect number.

Show Solution

# Exercise 51: Check Perfect Number

# Input number
num = 28

# Function to check if a number is perfect
def is_perfect(num):
    divisors_sum = sum(i for i in range(1, num) if num % i == 0)
    return divisors_sum == num

# Check if the number is perfect
is_perfect_number = is_perfect(num)

# Print the result
if is_perfect_number:
    print(num, "is a perfect number.")
else:
    print(num, "is not a perfect number.")

Exercise 52: Find Sum of Squares of First N Natural Numbers

Write a Python program that finds and prints the sum of squares of the first N natural numbers.

Show Solution

# Exercise 52: Find Sum of Squares of First N Natural Numbers

# Input number of terms
n = 5

# Calculate sum of squares
sum_of_squares = sum(i**2 for i in range(1, n+1))

# Print the result
print("Sum of squares of first", n, "natural numbers:", sum_of_squares)

Exercise 53: Calculate Harmonic Mean

Write a Python program that calculates and prints the harmonic mean of a given list of numbers.

Show Solution

# Exercise 53: Calculate Harmonic Mean

# Input list of numbers
numbers = [4, 9, 25]

# Calculate harmonic mean
harmonic_mean = len(numbers) / sum(1 / num for num in numbers)

# Print the harmonic mean
print("Harmonic mean of", numbers, "is:", harmonic_mean)

Exercise 54: Reverse a Number

Write a Python program that reverses a given number and prints the reversed number.

Show Solution

# Exercise 54: Reverse a Number

# Input number
num = 12345

# Reverse the number
reversed_num = int(str(num)[::-1])

# Print the reversed number
print("Reversed number:", reversed_num)

Exercise 55: Check Strong Prime Number

Write a Python program that checks if a given number is a strong prime number.

Show Solution

# Exercise 55: Check Strong Prime Number

# Function to check if a number is prime
def is_prime(n):
    if n < 2:
        return False
    for i in range(2, int(n ** 0.5) + 1):
        if n % i == 0:
            return False
    return True

# Function to check if a number is strong
def is_strong(num):
    return is_prime(num) and is_prime(sum(int(digit) for digit in str(num)))

# Input number
num = 17

# Check if the number is a strong prime
is_strong_prime = is_strong(num)

# Print the result
if is_strong_prime:
    print(num, "is a strong prime number.")
else:
    print(num, "is not a strong prime number.")

Exercise 56: Find ASCII Value of a Character

Write a Python program that takes a character as input and prints its corresponding ASCII value.

Show Solution

# Exercise 56: Find ASCII Value of a Character

# Input character
char = 'A'

# Get ASCII value
ascii_value = ord(char)

# Print the ASCII value
print("ASCII value of", char, "is:", ascii_value)

Exercise 57: Check Happy Number

Write a Python program that checks if a given number is a happy number.

Show Solution

# Exercise 57: Check Happy Number

# Function to calculate the sum of squares of digits
def square_digits_sum(n):
    return sum(int(digit)**2 for digit in str(n))

# Function to check if a number is happy
def is_happy(num):
    seen = set()
    while num != 1 and num not in seen:
        seen.add(num)
        num = square_digits_sum(num)
    return num == 1

# Input number
num = 19

# Check if the number is happy
is_happy_number = is_happy(num)

# Print the result
if is_happy_number:
    print(num, "is a happy number.")
else:
    print(num, "is not a happy number.")

Exercise 58: Find Prime Factors of a Number

Write a Python program that finds and prints the prime factors of a given number.

Show Solution

# Exercise 58: Find Prime Factors of a Number

# Function to find prime factors
def prime_factors(n):
    factors = []
    divisor = 2
    while n > 1:
        while n % divisor == 0:
            factors.append(divisor)
            n //= divisor
        divisor += 1
    return factors

# Input number
num = 36

# Find prime factors
factors = prime_factors(num)

# Print the prime factors
print("Prime factors of", num, "are:", factors)

Exercise 59: Check Palindrome String

Write a Python program that checks if a given string is a palindrome string.

Show Solution

# Exercise 59: Check Palindrome String

# Input string
string = "radar"

# Check if the string is a palindrome
is_palindrome = string == string[::-1]

# Print the result
if is_palindrome:
    print(string, "is a palindrome string.")
else:
    print(string, "is not a palindrome string.")

Exercise 60: Check Automorphic Number

Write a Python program that checks if a given number is an Automorphic number.

Show Solution

# Exercise 60: Check Automorphic Number

# Function to check if a number is automorphic
def is_automorphic(num):
    square = num ** 2
    return str(square).endswith(str(num))

# Input number
num = 25

# Check if the number is automorphic
is_automorphic_number = is_automorphic(num)

# Print the result
if is_automorphic_number:
    print(num, "is an automorphic number.")
else:

Exercise 61: Find HCF (GCD) of Two Numbers

Write a Python program that calculates and prints the Highest Common Factor (HCF) or Greatest Common Divisor (GCD) of two given numbers.

Show Solution

# Exercise 61: Find HCF (GCD) of Two Numbers

# Function to calculate GCD using Euclidean algorithm
def gcd(a, b):
    while b:
        a, b = b, a % b
    return a

# Input numbers
num1 = 48
num2 = 60

# Find and print the GCD
print("GCD of", num1, "and", num2, "is:", gcd(num1, num2))

Exercise 62: Generate Random Dates within a Range

Write a Python program that generates and prints a specified number of random dates within a given range.

Show Solution

# Exercise 62: Generate Random Dates within a Range

# Import necessary modules
import random
from datetime import datetime, timedelta

# Input number of random dates and date range
num_dates = 5
start_date = datetime(2022, 1, 1)
end_date = datetime(2022, 12, 31)

# Generate and print random dates
print("Random Dates:")
for _ in range(num_dates):
    random_date = start_date + timedelta(days=random.randint(0, (end_date - start_date).days))
    print(random_date.strftime("%Y-%m-%d"))

Exercise 63: Check Smooth Number

Write a Python program that checks if a given number is a smooth number.

Show Solution

# Exercise 63: Check Smooth Number

# Function to check if a number is smooth
def is_smooth(num):
    if num < 2:
        return False
    for divisor in [2, 3, 5]:
        while num % divisor == 0:
            num //= divisor
    return num == 1

# Input number
num = 60

# Check if the number is smooth
is_smooth_number = is_smooth(num)

# Print the result
if is_smooth_number:
    print(num, "is a smooth number.")
else:
    print(num, "is not a smooth number.")

Exercise 64: Find Perimeter of a Rectangle

Write a Python program that calculates and prints the perimeter of a rectangle given its length and width.

Show Solution

# Exercise 64: Find Perimeter of a Rectangle

# Input length and width
length = 5
width = 3

# Calculate perimeter
perimeter = 2 * (length + width)

# Print the perimeter
print("Perimeter of the rectangle:", perimeter)

Exercise 65: Find Armstrong Number

Write a Python program that checks if a given number is an Armstrong number.

# Exercise 65: Find Armstrong Number

# Function to calculate the sum of cubes of digits
def sum_of_cubes(n):
    return sum(int(digit)**3 for digit in str(n))

# Function to check if a number is Armstrong
def is_armstrong(num):
    return num == sum_of_cubes(num)

# Input number
num = 153

# Check if the number is Armstrong
is_armstrong_number = is_armstrong(num)

# Print the result
if is_armstrong_number:
    print(num, "is an Armstrong number.")
else:
    print(num, "is not an Armstrong number.")

Exercise 66: Calculate Area of a Circle

Write a Python program that calculates and prints the area of a circle given its radius.

Show Solution

# Exercise 66: Calculate Area of a Circle

# Import math module for pi
import math

# Input radius
radius = 4

# Calculate area
area = math.pi * radius**2

# Print the area
print("Area of the circle:", area)

Exercise 67: Check Amicable Numbers

Write a Python program that checks if two given numbers are amicable numbers.

Show Solution

# Exercise 67: Check Amicable Numbers

# Function to calculate the sum of proper divisors of a number
def sum_of_divisors(n):
    return sum(i for i in range(1, n) if n % i == 0)

# Function to check if two numbers are amicable
def are_amicable(num1, num2):
    return sum_of_divisors(num1) == num2 and sum_of_divisors(num2) == num1

# Input numbers
num1 = 220
num2 = 284

# Check if the numbers are amicable
are_amicable_numbers = are_amicable(num1, num2)

# Print the result
if are_amicable_numbers:
    print(num1, "and", num2, "are amicable numbers.")
else:
    print(num1, "and", num2, "are not amicable numbers.")

Exercise 68: Calculate Area of a Triangle

Write a Python program that calculates and prints the area of a triangle given its base and height.

Show Solution

# Exercise 68: Calculate Area of a Triangle

# Input base and height
base = 6
height = 8

# Calculate area
area = 0.5 * base * height

# Print the area
print("Area of the triangle:", area)

Exercise 69: Check Leap Year

Write a Python program that checks if a given year is a leap year.

Show Solution

# Exercise 69: Check Leap Year

# Function to check if a year is a leap year
def is_leap_year(year):
    if year % 4 == 0:
        if year % 100 == 0:
            return year % 400 == 0
        else:
            return True
    else:
        return False

# Input year
year = 2024

# Check if the year is a leap year
is_leap = is_leap_year(year)

# Print the result
if is_leap:
    print(year, "is a leap year.")
else:
    print(year, "is not a leap year.")

Exercise 70: Generate Fibonacci Series

Write a Python program that generates and prints the Fibonacci series up to a specified number of terms.

Show Solution

# Exercise 70: Generate Fibonacci Series

# Input number of terms
terms = 10

# Initialize first two terms
a, b = 0, 1

# Print Fibonacci series
print("Fibonacci Series:")
for _ in range(terms):
    print(a, end=" ")
    a, b = b, a + b

Exercise 71: Word Frequency Counter

Write a Python program that reads a text file, counts the frequency of each word in the file, and prints the word frequencies in descending order.

Steps:

Read the content of the text file.
Tokenize the content into words.
Count the frequency of each word.
Store the word frequencies in a dictionary.
Sort the dictionary by values (word frequencies) in descending order.
Print the sorted word frequencies.

Show Solution

from collections import defaultdict
import re

def word_frequency_counter(filename):
    # Step 1: Read the content of the text file
    with open(filename, 'r', encoding='utf-8') as file:
        content = file.read()

    # Step 2: Tokenize the content into words
    words = re.findall(r'\b\w+\b', content.lower())

    # Step 3: Count the frequency of each word
    word_freq = defaultdict(int)
    for word in words:
        word_freq[word] += 1

    # Step 4: Sort the dictionary by values in descending order
    sorted_word_freq = sorted(word_freq.items(), key=lambda x: x[1], reverse=True)

    # Step 5: Print the sorted word frequencies
    for word, freq in sorted_word_freq:
        print(f'{word}: {freq}')

# Example usage:
filename = 'sample.txt'  # Replace with your filename
word_frequency_counter(filename)

Exercise 72: File Copy with Encryption

Write a Python program that copies the contents of one file to another while encrypting the data. You can choose a simple encryption technique, such as Caesar cipher, to encrypt the data.

Steps:

Read the content of the source file.
Encrypt the content using a chosen encryption technique.
Write the encrypted content to the destination file.

Show Solution

# Step 1: Read the content of the source file
def read_file(filename):
    with open(filename, 'r') as file:
        return file.read()

# Step 2: Encrypt the content using Caesar cipher
def caesar_cipher_encrypt(text, shift):
    encrypted_text = ''
    for char in text:
        if char.isalpha():
            if char.islower():
                encrypted_text += chr((ord(char) - ord('a') + shift) % 26 + ord('a'))
            else:
                encrypted_text += chr((ord(char) - ord('A') + shift) % 26 + ord('A'))
        else:
            encrypted_text += char
    return encrypted_text

# Step 3: Write the encrypted content to the destination file
def write_encrypted_content(filename, encrypted_text):
    with open(filename, 'w') as file:
        file.write(encrypted_text)

# Main function to execute the program
def main():
    source_filename = 'source.txt'  # Update with the filename of your source file
    destination_filename = 'destination.txt'  # Update with the filename of your destination file
    shift = 3  # Define the shift for Caesar cipher

    # Read content from source file
    source_content = read_file(source_filename)

    # Encrypt content using Caesar cipher
    encrypted_content = caesar_cipher_encrypt(source_content, shift)

    # Write encrypted content to destination file
    write_encrypted_content(destination_filename, encrypted_content)

    print("Content encrypted and copied to destination file.")

if __name__ == "__main__":
    main()

Exercise 73: File Word Reversal

Write a Python program that reads the content of a text file, reverses the order of the words in each line, and writes the modified content to another file.

Steps:

Read the content of the source file.
Split the content into lines.
For each line, split the line into words.
Reverse the order of the words in each line.
Join the words back into lines.
Write the modified content to the destination file.

Show Solution

# Exercise: File Word Reversal

# Step 1: Read the content of the source file
def read_file(filename):
    with open(filename, 'r') as file:
        return file.readlines()

# Step 2: Reverse the order of words in each line
def reverse_words(line):
    words = line.split()
    reversed_words = ' '.join(reversed(words))
    return reversed_words

# Step 3: Write the modified content to the destination file
def write_modified_content(filename, modified_content):
    with open(filename, 'w') as file:
        file.writelines(modified_content)

# Main function to execute the program
def main():
    source_filename = 'source.txt'  # Update with the filename of your source file
    destination_filename = 'destination.txt'  # Update with the filename of your destination file

    # Read content from source file
    lines = read_file(source_filename)

    # Reverse the order of words in each line
    reversed_lines = [reverse_words(line) for line in lines]

    # Write modified content to destination file
    write_modified_content(destination_filename, reversed_lines)

    print("Content reversed and written to destination file.")

if __name__ == "__main__":
    main()

Exercise 74: File Line Reversal

Write a Python program that reads the content of a text file, reverses the order of lines, and writes the modified content to another file.

Steps:

Read the content of the source file.
Split the content into lines.
Reverse the order of lines.
Write the modified content to the destination file.

Show Solution

# Exercise: File Line Reversal

# Step 1: Read the content of the source file
def read_file(filename):
    with open(filename, 'r') as file:
        return file.readlines()

# Step 2: Reverse the order of lines
def reverse_lines(lines):
    return reversed(lines)

# Step 3: Write the modified content to the destination file
def write_modified_content(filename, modified_content):
    with open(filename, 'w') as file:
        file.writelines(modified_content)

# Main function to execute the program
def main():
    source_filename = 'source.txt'  # Update with the filename of your source file
    destination_filename = 'destination.txt'  # Update with the filename of your destination file

    # Read content from source file
    lines = read_file(source_filename)

    # Reverse the order of lines
    reversed_lines = reverse_lines(lines)

    # Write modified content to destination file
    write_modified_content(destination_filename, reversed_lines)

    print("Content reversed and written to destination file.")

if __name__ == "__main__":
    main()

Exercise 75: File Concatenation

Write a Python program that reads the content of multiple text files, concatenates their content, and writes the combined content to another file.

Steps:

Read the content of each source file.
Concatenate the content of all files.
Write the combined content to the destination file.

Show Solution

# Exercise: File Concatenation

# Step 1: Read the content of each source file
def read_files(filenames):
    combined_content = []
    for filename in filenames:
        with open(filename, 'r') as file:
            combined_content.extend(file.readlines())
    return combined_content

# Step 2: Write the combined content to the destination file
def write_combined_content(destination_filename, combined_content):
    with open(destination_filename, 'w') as file:
        file.writelines(combined_content)

# Main function to execute the program
def main():
    source_filenames = ['file1.txt', 'file2.txt', 'file3.txt']  # Update with the filenames of your source files
    destination_filename = 'combined.txt'  # Update with the filename of your destination file

    # Read content from source files
    combined_content = read_files(source_filenames)

    # Write combined content to destination file
    write_combined_content(destination_filename, combined_content)

    print("Content concatenated and written to destination file.")

if __name__ == "__main__":
    main()

Exercise 76: File Word Count

Write a Python program that reads the content of a text file, counts the occurrences of each word, and prints the word counts.

Steps:

Read the content of the source file.
Tokenize the content into words.
Count the occurrences of each word.
Print the word counts.

Show Solution

# Exercise: File Word Count

# Step 1: Read the content of the source file
def read_file(filename):
    with open(filename, 'r') as file:
        return file.read()

# Step 2: Tokenize the content into words
def tokenize(text):
    return text.split()

# Step 3: Count the occurrences of each word
def count_word_frequency(words):
    word_frequency = {}
    for word in words:
        word_frequency[word] = word_frequency.get(word, 0) + 1
    return word_frequency

# Step 4: Print the word counts
def print_word_count(word_frequency):
    for word, count in word_frequency.items():
        print(f'{word}: {count}')

# Main function to execute the program
def main():
    filename = 'sample.txt'  # Update with the filename of your source file

    # Read content from source file
    text = read_file(filename)

    # Tokenize content into words
    words = tokenize(text)

    # Count word frequency
    word_frequency = count_word_frequency(words)

    # Print word counts
    print_word_count(word_frequency)

if __name__ == "__main__":
    main()

Exercise 77: File Line Count

Write a Python program that reads the content of a text file, counts the number of lines, and prints the total line count.

Steps:

Read the content of the source file.
Split the content into lines.
Count the number of lines.
Print the total line count.

Show Solution

# Exercise: File Line Count

# Step 1: Read the content of the source file
def read_file(filename):
    with open(filename, 'r') as file:
        return file.readlines()

# Step 2: Count the number of lines
def count_lines(lines):
    return len(lines)

# Step 3: Print the total line count
def print_line_count(total_lines):
    print(f'Total number of lines: {total_lines}')

# Main function to execute the program
def main():
    filename = 'sample.txt'  # Update with the filename of your source file

    # Read content from source file
    lines = read_file(filename)

    # Count the number of lines
    total_lines = count_lines(lines)

    # Print the total line count
    print_line_count(total_lines)

if __name__ == "__main__":
    main()

Exercise 78: File Word Replacement

Write a Python program that reads the content of a text file, replaces a specific word with another word, and writes the modified content to another file.

Steps:

Read the content of the source file.
Replace the specific word with another word.
Write the modified content to the destination file.

Show Solution

# Exercise 78: File Word Replacement

# Step 1: Read the content of the source file
def read_file(filename):
    with open(filename, 'r') as file:
        return file.read()

# Step 2: Replace the specific word with another word
def replace_word(text, old_word, new_word):
    return text.replace(old_word, new_word)

# Step 3: Write the modified content to the destination file
def write_modified_content(filename, modified_content):
    with open(filename, 'w') as file:
        file.write(modified_content)

# Main function to execute the program
def main():
    source_filename = 'source.txt'  # Update with the filename of your source file
    destination_filename = 'modified.txt'  # Update with the filename of your destination file
    old_word = 'old_word'  # Specify the word to replace
    new_word = 'new_word'  # Specify the new word

    # Read content from source file
    text = read_file(source_filename)

    # Replace the specific word with another word
    modified_text = replace_word(text, old_word, new_word)

    # Write the modified content to the destination file
    write_modified_content(destination_filename, modified_text)

    print("Word replaced and written to destination file.")

if __name__ == "__main__":
    main()

Exercise 79: File Content Filtering

Write a Python program that reads the content of a text file, filters out lines containing a specific keyword, and writes the filtered content to another file.

Steps:

Read the content of the source file.
Filter out lines containing the specific keyword.
Write the filtered content to the destination file.

Show Solution

# Exercise: File Content Filtering

# Step 1: Read the content of the source file
def read_file(filename):
    with open(filename, 'r') as file:
        return file.readlines()

# Step 2: Filter out lines containing the specific keyword
def filter_content(lines, keyword):
    filtered_lines = [line for line in lines if keyword in line]
    return filtered_lines

# Step 3: Write the filtered content to the destination file
def write_filtered_content(filename, filtered_content):
    with open(filename, 'w') as file:
        file.writelines(filtered_content)

# Main function to execute the program
def main():
    source_filename = 'source.txt'  # Update with the filename of your source file
    destination_filename = 'filtered.txt'  # Update with the filename of your destination file
    keyword = 'python'  # Specify the keyword to filter lines

    # Read content from source file
    lines = read_file(source_filename)

    # Filter out lines containing the specific keyword
    filtered_lines = filter_content(lines, keyword)

    # Write the filtered content to the destination file
    write_filtered_content(destination_filename, filtered_lines)

    print("Content filtered and written to destination file.")

if __name__ == "__main__":
    main()

Exercise 80: File Line Sorting

Write a Python program that reads the content of a text file, sorts the lines alphabetically, and writes the sorted content to another file.

Steps:

Read the content of the source file.
Sort the lines alphabetically.
Write the sorted content to the destination file.

Show Solution

# Exercise 80: File Line Sorting

# Step 1: Read the content of the source file
def read_file(filename):
    with open(filename, 'r') as file:
        return file.readlines()

# Step 2: Sort the lines alphabetically
def sort_lines(lines):
    return sorted(lines)

# Step 3: Write the sorted content to the destination file
def write_sorted_content(filename, sorted_content):
    with open(filename, 'w') as file:
        file.writelines(sorted_content)

# Main function to execute the program
def main():
    source_filename = 'source.txt'  # Update with the filename of your source file
    destination_filename = 'sorted.txt'  # Update with the filename of your destination file

    # Read content from source file
    lines = read_file(source_filename)

    # Sort the lines alphabetically
    sorted_lines = sort_lines(lines)

    # Write the sorted content to the destination file
    write_sorted_content(destination_filename, sorted_lines)

    print("Content sorted and written to destination file.")

if __name__ == "__main__":
    main()

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