# \#loop

**URL:** https://forum.freecodecamp.org/tag/loop/291.md

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## [Loop /return/ is not possible](https://forum.freecodecamp.org/t/loop-return-is-not-possible/133058)

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**Author:** [@eldarmammadov](https://forum.freecodecamp.org/u/eldarmammadov)\
**Replies:** 3\
**Last updated:** [June 30, 2017, 7:26am UTC](https://forum.freecodecamp.org/t/loop-return-is-not-possible/133058 "2017-06-30T07:26:47Z")

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javascript function mutation(arr) { var a = arr\[0\]; var b = arr\[1\]; // for (var i = 0; i \< b.length; i++) { // console.log(b\[i\]); // console.log(a.indexOf(b\[i\],0)); // } for (var i = 0; i \< …