freeCodeCamp/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/access-multi-dimensional-arrays-with-indexes.md

---
id: 56592a60ddddeae28f7aa8e1
title: Access Multi-Dimensional Arrays With Indexes
challengeType: 1
videoUrl: 'https://scrimba.com/c/ckND4Cq'
forumTopicId: 16159
dashedName: access-multi-dimensional-arrays-with-indexes
---

# --description--

One way to think of a <dfn>multi-dimensional</dfn> array, is as an *array of arrays*. When you use brackets to access your array, the first set of brackets refers to the entries in the outer-most (the first level) array, and each additional pair of brackets refers to the next level of entries inside.

**Example**

```js
const arr = [
  [1, 2, 3],
  [4, 5, 6],
  [7, 8, 9],
  [[10, 11, 12], 13, 14]
];

arr[3];
arr[3][0];
arr[3][0][1];
```

`arr[3]` is `[[10, 11, 12], 13, 14]`, `arr[3][0]` is `[10, 11, 12]`, and `arr[3][0][1]` is `11`.

**Note:** There shouldn't be any spaces between the array name and the square brackets, like `array [0][0]` and even this `array [0] [0]` is not allowed. Although JavaScript is able to process this correctly, this may confuse other programmers reading your code.

# --instructions--

Using bracket notation select an element from `myArray` such that `myData` is equal to `8`.

# --hints--

`myData` should be equal to `8`.

```js
assert(myData === 8);
```

You should be using bracket notation to read the correct value from `myArray`.

```js
assert(/myData=myArray\[2\]\[1\]/.test(__helpers.removeWhiteSpace(code)));
```

# --seed--

## --after-user-code--

```js
if(typeof myArray !== "undefined"){(function(){return "myData: " + myData + " myArray: " + JSON.stringify(myArray);})();}
```

## --seed-contents--

```js
const myArray = [
  [1, 2, 3],
  [4, 5, 6],
  [7, 8, 9],
  [[10, 11, 12], 13, 14],
];

const myData = myArray[0][0];
```

# --solutions--

```js
const myArray = [[1, 2, 3], [4, 5, 6], [7, 8, 9], [[10, 11, 12], 13, 14]];
const myData = myArray[2][1];
```