freeCodeCamp/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/manipulate-arrays-with-push.english.md

---
id: 56bbb991ad1ed5201cd392cb
title: Manipulate Arrays With push()
challengeType: 1
videoUrl: 'https://scrimba.com/c/cnqmVtJ'
forumTopicId: 18237
---

## Description
<section id='description'>
An easy way to append data to the end of an array is via the <code>push()</code> function.
<code>.push()</code> takes one or more <dfn>parameters</dfn> and "pushes" them onto the end of the array.

Examples:

```js
var arr1 = [1,2,3];
arr1.push(4);
// arr1 is now [1,2,3,4]

var arr2 = ["Stimpson", "J", "cat"];
arr2.push(["happy", "joy"]);
// arr2 now equals ["Stimpson", "J", "cat", ["happy", "joy"]]
```

</section>

## Instructions
<section id='instructions'>
Push <code>["dog", 3]</code> onto the end of the <code>myArray</code> variable.
</section>

## Tests
<section id='tests'>

```yml
tests:
  - text: <code>myArray</code> should now equal <code>[["John", 23], ["cat", 2], ["dog", 3]]</code>.
    testString: assert((function(d){if(d[2] != undefined && d[0][0] == 'John' && d[0][1] === 23 && d[2][0] == 'dog' && d[2][1] === 3 && d[2].length == 2){return true;}else{return false;}})(myArray));

```

</section>

## Challenge Seed
<section id='challengeSeed'>

<div id='js-seed'>

```js
// Setup
var myArray = [["John", 23], ["cat", 2]];

// Only change code below this line


```

</div>


### After Test
<div id='js-teardown'>

```js
(function(z){return 'myArray = ' + JSON.stringify(z);})(myArray);
```

</div>

</section>

## Solution
<section id='solution'>


```js
var myArray = [["John", 23], ["cat", 2]];
myArray.push(["dog",3]);
```

</section>