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Showing content from https://webplatform.github.io/docs/javascript/Array/pop below:

pop · WebPlatform Docs

pop Summary

Removes the last element from an array and returns it.

Syntax

pop( )

Examples

The following example illustrates the use of the pop method.

var number;
 var my_array = new Array();

 my_array.push (5, 6, 7);
 my_array.push (8, 9);

 number = my_array.pop();
 while (number != undefined)
    {
    document.write (number + " ");
    number = my_array.pop();
    }

Remarks

The push and pop methods enable you to simulate a stack, which uses the principle of last in, first out (LIFO) to store data.

The required arrayObj reference is an Array object.

If the array is empty, undefined is returned.