JavaScript Array pop() Method

Last Updated : 01 Nov, 2021

Below is the example of Array pop() method.

Hey geek! The constant emerging technologies in the world of web development always keeps the excitement for this subject through the roof. But before you tackle the big projects, we suggest you start by learning the basics. Kickstart your web development journey by learning JS concepts with our JavaScript Course. Now at it's lowest price ever!

Example:

<script>
    function func() {
        var arr = ['GFG', 'gfg', 'g4g', 'GeeksforGeeks'];
      
        // Popping the last element from the array 
        document.write(arr.pop());
      
    }
    func();
</script>                    

Output:
```
GeeksforGeeks
```

The arr.pop() method is used to remove the last element of the array and also returns the removed element. This function decreases the length of the array by 1.

Syntax:

arr.pop()

Parameters: This method does not accept any parameter.

Return value This method returns the removed element array. If the array is empty, then this function returns undefined.

Below examples illustrate the JavaScript Array pop() method:

Example 1: In this example the pop() method removes the last element from the array, which is 4 and returns it.
```
var arr = [34, 234, 567, 4];
var popped = arr.pop();
print(popped);
print(arr);
```
Output:
```
4
34,234,567
```
Example 2: In this example the function pop() tries to extract the last element of the array but since the array is empty therefore it returns undefined as the answer.
```
var arr = [];
var popped = arr.pop();
print(popped);
```
Output:
```
undefined
```

More example codes for the above method are as follows:

Program 1:

<script>
function func() {
    var arr = [34, 234, 567, 4];
  
    // Popping the last element from the array 
    var popped = arr.pop();
    document.write(popped);
    document.write("<br>");
    document.write(arr);
}
func();
</script>

Output:

4
34,234,567

Program 2:

<script>
function func() {
  
    var arr = [];
  
    // popping the last element
    var popped = arr.pop();
    document.write(popped);
}
func();
</script>