Python While Loops

Repeat while a condition is true.

✍️ 3 exercises + code challenge in this lesson

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A while loop runs as long as its condition is True.

break: stop the loop immediately.
continue: skip to the next iteration.
else: runs once when the condition becomes false (not after a break).

Remember to change the variable in the condition, or the loop will run forever.

Key Takeaways: Python While Loops

Mastering Python While Loops helps you write clean and reliable Python code. Follow standard conventions, test edge cases, and keep logic simple. Try running the code example below and complete the exercises to build confidence.

Python While Loops Code Example

Python

balance = 1000
month = 0
while balance < 2000:
    balance *= 1.10
    month += 1
print(f"Balance doubles after {month} months: Rs {balance:.0f}")

n = 0
while n < 10:
    n += 1
    if n % 2 == 0:
        continue
    if n > 7:
        break
    print("odd:", n)

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Python While Loops Practice Exercises

Check what you learned in “Python While Loops”.

/ 3 solved

Fill in the blank

Stop the loop immediately.

while True:

✓ Correct! Not quite. Try again.

Multiple choice

When does a while loop stop?

When its condition becomes False After 10 runs Never When it prints

✓ Correct! Not quite. Try again.

Code challenge

Use a while loop to print 3, 2, 1 on separate lines.

Write the code in the live editor. Your answer is checked automatically.

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Python While Loops

💡 Key Takeaways: Python While Loops

Python While Loops Code Example

Python While Loops Practice Exercises

Key Takeaways: Python While Loops