JAVASCRIPT - JOIN TWO ARRAYS

How to extend an existing Array or join two Arrays?

Let us say, we have a Array that contains three names, Mohan, Kriti and Salim. And we want to insert a new Array with two names Sia and Andrew at the end of the Array.

There are two ways by which we can join or extend Array.

By using the + operator

Using the extend() Function

At first let us see the Joining of two Arrays using + operator.

Example :

<html>
<body>  
<script>

	var x = ["Mohan", "Kriti", "Salim"]
	var y = ["Sia", "Andrew"]
	var z = x.concat(y)
	document.write(z)
    
</script>      
</body>
</html>

Output :

Mohan,Kriti,Salim,Sia,Andrew

So, in the above code we have created a Array and initialised to the variable x.

x = ["Mohan", "Kriti", "Salim"]

Below is how the values are positioned in the Array,

Also we have another Array that contains, Sia and Andrew.

	y = ["Sia", "Andrew"]

Next, we have used the concat() function to add the the Arrays x and y.

var z = x.concat(y)

And the Arrays x and yis joined and initialised to a new Array z.

And we get the below output,

Mohan,Kriti,Salim,Sia,Andrew

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