Python While Loop Exercises: Practice & Master Loops

harpen your Python skills with interactive while loop exercises. Ideal for students and developers, these practice problems help you master iterative programming concepts.

Topic: loops-while

🧪 Coding Exercises

🟢 Beginner Exercises

1. ✅ Print Numbers from 1 to 10

Write a `while` loop to print numbers from 1 to 10.

Requirements

• Use a while loop
• Print numbers 1 through 10 inclusive

Expected Output

1 2 3 4 5 6 7 8 9 10

📚 📺 Watch the solution now!

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2. ✅ Sum of First N Natural Numbers

Write a program that asks the user for a number `n` and calculates the sum of numbers from 1 to `n` using a `while` loop.

Requirements

• Use while loop
• Handle user input
• Calculate correct sum

Input

5

Expected Output

15

📚 📺 Watch the solution now!

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3. ✅ Multiplication Table

Write a program to print the multiplication table of a given number using a `while` loop.

Requirements

• Use while loop
• Print table up to 10
• Format as 'num x i = result'

Input

5

Expected Output

5 x 1 = 5
5 x 2 = 10
...
5 x 10 = 50

📚 📺 Watch the solution now!

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4. ✅ Count Digits in a Number

Write a program to count the number of digits in a given number using a `while` loop.

Requirements

• Use while loop
• Handle all positive integers
• Count digits correctly

Input

12345

Expected Output

5

📚 📺 Watch the solution now!

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5. ✅ Print Even Numbers

Write a program to print even numbers between 1 and 20 using a `while` loop.

Requirements

• Use while loop
• Print only even numbers
• Include 20 if even

Expected Output

2 4 6 8 10 12 14 16 18 20

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6. ✅ Sum Numbers Until Zero Input

Write a Python program that continuously prompts the user to enter numbers. 
The program should calculate and display the sum of all entered numbers. 
The input process should terminate when the user enters the number `0`.

Requirements

• Use a `while` loop to repeatedly take input.
• The loop must terminate when the user enters `0`.
• Initialize a sum variable to accumulate the numbers.
• Convert user input to an integer before performing calculations.
• Print the final sum after the loop finishes.

Input

5
7
8
2
0

Expected Output

Sum of the numbers: 22

📚 📺 Watch the solution now!

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🟡 Intermediate Exercises

1. ✅ Reverse a Number

Ask the user to enter a number and print its reverse using a `while` loop.

Requirements

• Use while loop
• Handle multi-digit numbers
• Properly reverse digits

Input

1234

Expected Output

4321

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2. ✅ Sum of Digits

Write a program to calculate the sum of digits of a given number using a `while` loop.

Requirements

• Use while loop
• Handle multi-digit numbers
• Calculate correct sum

Input

123

Expected Output

6

📚 📺 Watch the solution now!

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3. ✅ Count Occurrence of a Specific Digit

Write a program to count occurrences of a specific digit in a number using Python.

Requirements

• Use while loop
• Handle string or numeric input
• Count all occurrences

Input

122333
2

Expected Output

2

📚 📺 Watch the solution now!

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🔴 Advanced Exercises

1. ✅ Factorial Calculation

Create a program to calculate the factorial of a given number using a `while` loop.

Requirements

• Use while loop
• Handle 0 and 1 cases
• Calculate correct factorial

Input

5

Expected Output

120

📚 📺 Watch the solution now!

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🧠 Practice & Progress

• ✅ True or False
• ✍️ Fill in the Blanks
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• 🔍 Find and Fix Mistakes
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