14 lines
258 B
Markdown
14 lines
258 B
Markdown
### 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
|
|
```
|