JavaScript Array (Push, Pop, Shift, Unshift)

Array pop(), push(), shift() and unshift() Methods in JavaScript

pop() : 

Remove an item from the end of an array

pop() returns the removed item.

The method takes no arguments.

push() : 

Add items to the end of an array

push() returns the new array length.

The value which is an argument passed to the method could be a number, string, object or even array.

shift() : 

Remove an item from the beginning of an array

shift() returns the removed item.

The method takes no argument.

unshift() : 

Add items to the beginning of an array

unshift() returns the new array length.

The method takes an argument of value which could be object, array, string, etc.