JavaScript Array pop()

The JavaScript Array pop() method removes the last element from an array and returns that element.

The syntax of the pop() method is:

arr.pop()

Here, arr is an array.


pop() Parameters

The pop() method does not have any parameters.


Return value from pop()

  • Removes the last element from array and returns that value.
  • Returns undefined if the array is empty.

Notes:

  • This method changes the original array and its length.
  • To remove the first element of an array, use the JavaScript Array shift() method.

Example: Using pop() method

var languages = ["JavaScript", "Python", "Java", "C++", "Lua"];

var popped = languages.pop();

console.log(languages); // [ 'JavaScript', 'Python', 'Java', 'C++' ]
console.log(popped); // Lua

// pop returns any type of object
var numbers = [
  [1, 2, 3],
  [4, 5, 6],
  [-5, -4, -3],
];
console.log(numbers.pop()); // [ -5, -4, -3 ]
console.log(numbers); // [ [ 1, 2, 3 ], [ 4, 5, 6 ] ]

Output

[ 'JavaScript', 'Python', 'Java', 'C++' ]
Lua
[ -5, -4, -3 ]
[ [ 1, 2, 3 ], [ 4, 5, 6 ] ]

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