Must-do problems: Loops

90 min · Beginner

These are the loop problems every Python beginner should be able to solve, from a simple countdown to prime factors and a centred pyramid. Trace each one on paper with a small input first, then check your program against every test.

What you will learn

Choose between while and for for a task
Work with digits using % 10 and // 10
Stop a loop with break and test for primes with for-else
Build star patterns with loops and string repetition

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