The JavaScript array method .pop() will remove the last element from an array and returns that element.
Syntax
var array = [1, 2, 3, 4, 5];
array.pop();
Description
.pop() ‘pops’ the last element in an array off and returns that element
.pop() will return undefined if the array it is called on is empty.
Examples
Popping off the last value in an array
var array = [1, 2, 3, 4, 5];
console.log(array);
// Console will output 1, 2, 3, 4, 5
array.pop();
/* If we console.log(array.pop()); the console would output 5
because 5 was popped off the array by .pop(). */
console.log(array);
/* Console will output 1, 2, 3, 4 and
the variable array now contains the set [1, 2, 3, 4] */
Array.prototype.pop
The pop() method removes the last element from and changes the length of an array.
Syntax
arr.pop()
Return value
- The removed element from the array; undefined if the array is empty.
Description
The pop() method removes the last element from an array and returns that value to the caller.
If you call pop() on an empty array, it returns undefined.
Examples
let array = [1, 2, 3, 4];
array.pop(); // removes 4
console.log(array); // [1, 2, 3]
[].pop() // undefined