# Get a random element from a JavaScript array

javascript

## Table of Contents

To get a random element from an array, you can use a couple of `Math`

functions to generate a random index and retrieve a value.

```
function random(items) {
return items[Math.floor(Math.random() * items.length)]
}
```

### How it works

`Math.random()`

generates a random float between `0`

and `1`

. The generated float is always less than `1`

, so when we multiply it by the length of the array, it's always going to be less than `items.length`

.

Since the result of this operation is a floating-point number and arrays are integer-based, we can use `Math.floor()`

to round that number down.

This approach guarantees that the generated index is always in the range `0..items.length`

and will never produce an invalid index.

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