Lesson 5 of 19

Loops

Repeat work with for and while loops.

Introduction

Loops are useful when the same operation needs to run repeatedly.

Use a for loop when iterating over a collection or known range, and a while loop when repetition depends on a condition.

Key insight

Example

for number in range(1, 6):
    print(number)

This example shows the core loops idea in a small, runnable program.

Real-world example

Test yourself

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Answer every question, then submit your quiz.

Try it yourself

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Practice challenge

Print the even numbers from 2 through 10.