---
title: Modify Array Data With Indexes
---
## Modify Array Data With Indexes

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Access the position of the array, and change it, like so:

```javascript
var arr = [1, 2, 3, 4, 5];
    
arr[0] = 6; // Now, the array is [6, 2, 3, 4, 5]
arr[4] = 10 // Now, the array is [6, 2, 3, 4, 10]
```

The important concept here is that arrays are **mutable**. This means that they can be changed easily.