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30-seconds-of-code/snippets/collatz.md
2017-12-17 17:55:51 +02:00

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### collatz
Applies the Collatz algorithm.
If `n` is even, return `n/2`. Otherwise return `3n+1`.
```js
const collatz = n => (n % 2 == 0) ? (n / 2) : (3 * n + 1);
// collatz(8) --> 4
// collatz(5) --> 16
```