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30-seconds-of-code/snippets/arraySum.md
Angelos Chalaris 97c250bcfb Updated examples
2017-12-27 16:35:25 +02:00

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### arraySum
Returns the sum of an array of numbers.
Use `Array.reduce()` to add each value to an accumulator, initialized with a value of `0`.
```js
const arraySum = arr => arr.reduce((acc, val) => acc + val, 0);
```
```js
arraySum([1,2,3,4]) // 10
```