Python Lesson 10: WHILE Loops Explained (Beginner GCSE-Ready) | Avoid Infinite Loop Mistakes

WHILE loops are powerful — but they’re also where students accidentally create infinite loops.

In Lesson 10, you’ll learn how WHILE loops work in Python, how conditions control repetition, and how to avoid the most common iteration mistakes in GCSE Computer Science.

This lesson is part of a complete, structured Python course designed for:
GCSE Computer Science
KS3 / KS4 programming
Classroom teaching
Cover and supply lessons
Independent revision

Clear Code Teaching is an all-in-one Python teaching solution — full lessons, prediction training, extendable programs, and exam-style thinking in every video.

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What You’ll Learn
What iteration means
How a while loop works
How loop conditions are checked
How to prevent infinite loops
The importance of updating variables inside the loop

Example Concepts Covered
Counting loops
Password validation
Input-controlled repetition
Score trackers
Loop termination conditions

Beginner / GCSE Exam Focus
Students often lose marks because they:
Forget to update the loop variable
Misunderstand when the condition is checked
Confuse WHILE with FOR loops
This lesson directly fixes those misconceptions.

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