Unit 2 Task 32 - Collatz hailstone length

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The Collatz process: start with a positive integer n.

• If n is even, replace n with n // 2
• If n is odd, replace n with 3 * n + 1

Repeat until n becomes 1. Count how many steps it took (each change is one step; you may or may not count the starting number-be consistent and state it).

Example: Starting at 6, the sequence is 6 → 3 → 10 → 5 → 16 → 8 → 4 → 2 → 1.

Skills: while, if / else, arithmetic.