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

---
id: 56bbb991ad1ed5201cd392cc
title: Manipulate Arrays With pop()
challengeType: 1
videoUrl: 'https://scrimba.com/c/cRbVZAB'
forumTopicId: 18236
dashedName: manipulate-arrays-with-pop
---

# --description--

Another way to change the data in an array is with the `.pop()` function.

`.pop()` is used to "pop" a value off of the end of an array. We can store this "popped off" value by assigning it to a variable. In other words, `.pop()` removes the last element from an array and returns that element.

Any type of entry can be "popped" off of an array - numbers, strings, even nested arrays.

```js
var threeArr = [1, 4, 6];
var oneDown = threeArr.pop();
console.log(oneDown); // Returns 6
console.log(threeArr); // Returns [1, 4]
```

# --instructions--

Use the `.pop()` function to remove the last item from `myArray`, assigning the "popped off" value to `removedFromMyArray`.

# --hints--

`myArray` should only contain `[["John", 23]]`.

```js
assert(
  (function (d) {
    if (d[0][0] == 'John' && d[0][1] === 23 && d[1] == undefined) {
      return true;
    } else {
      return false;
    }
  })(myArray)
);
```

You should use `pop()` on `myArray`.

```js
assert(/removedFromMyArray\s*=\s*myArray\s*.\s*pop\s*(\s*)/.test(code));
```

`removedFromMyArray` should only contain `["cat", 2]`.

```js
assert(
  (function (d) {
    if (d[0] == 'cat' && d[1] === 2 && d[2] == undefined) {
      return true;
    } else {
      return false;
    }
  })(removedFromMyArray)
);
```

# --seed--

## --after-user-code--

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

## --seed-contents--

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

// Only change code below this line
var removedFromMyArray;
```

# --solutions--

```js
var myArray = [["John", 23], ["cat", 2]];
var removedFromMyArray = myArray.pop();
```