Add Element to Beginning & End of Array JavaScript

Add Element to Beginning & End of Array JavaScript

In this tutorial, you will learn how to add element at the beginning and at the end of an array in javascript.

javascript has two inbuilt array methods name unshift() and push(), which is used to add elements or items at first or beginning and last or ending of an array in javascript.

This tutorial has the purpose to explain how to add an element at the beginning and ending of an array in javascript using these unshift and push js methods. Also, we will explain definition, syntax, parameters, with examples.

You should also read this javascript array posts:

JavaScript add Element beginning and ending of array

In this tutorial, we will show you two methods with its definition, syntax, parameters with examples to add element or item first or beginning and last or ending of an array javascript.

1. JavaScript Add Element to Array First

You can use the javascript unshift() method to add elements or items first or beginning array in javascript.

unshift() method javascript

Definition:- The javaScript unshift() method adds new items to the first or beginning of an array. and it will return the new length of array.

Syntax of unshift() method is

 array.unshift(element1, element2, ..., elementX)

Parameter with description

ParameterDescription
element1, element2, …, elementX Ii is required. The element(s) to add to the beginning of the array

Example – add element start or beginning of an array javascript

Consider, we have an array that’s the name arrNum, and it contains four elements inside it, see below:

var arrNum = [
   "one",
   "two",
   "three",
   "four"
 ];

If you want to add element start or beginning of an arrNum array. So you can use the unshift() method of javaScript like below:

var arrNum = [
   "one",
   "two",
   "three",
   "four"
 ];

 arrNum.unshift("zero");

 console.log( arrNum );

The result of the above example is:

["zero", "one", "two", "three", "four"]

2. JavaScript Add Element to Array Last

You can use the javascript push() method to add the elements or items from the last or end of an array.

push() method javascript

Definition: – The javaScript push() method is used to add a new element to the last or end of an array.

Syntax of push() method is

 array.push( element1, element2, ..., elementX )

Parameter with description

ParameterDescription
element1, element2, …, elementX Ii is required. The element(s) to add to the array

Example – javascript add the element to last or end of an array

Consider, we have an array that’s the name arrNum, and it contains four elements inside it, see below:

var arrNum = [
   "one",
   "two",
   "three",
   "four"
 ];

If you want to add the single item into the arryNum array. So you can use the push() method of javaScript like below:

var arrNum = [
   "one",
   "two",
   "three",
   "four"
 ];

 arrNum.push("five");

 console.log( arrNum );

The result of the above example is:

["one", "two", "three", "four", "five"]

If you want to see more example of javascript push() method, you can click and see here

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