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Insert in Array JavaScript:- Geniusofstudent

July 11, 2019 - JavaScript

push

For adding new items at the end of an array we can use push() method.
Syntax

Array.push(item1,item2....itemN);

unshift

For adding new items at the beginning of an array we can use unshift() method.
Syntax

Array.unshift(item1,item2....itemN);

Change value by array index

Array values can access using array index value, we can replace the array value by using its index value.
Syntax

array_variable[index]=value;

Code:-

<!DOCTYPE html>

<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
</head>
<body>
<h1>Actual Array Value : [10,20]</h1>
<input type="button" onclick="ar_fun();" value="Insert to Array">
<script>
function ar_fun()
{
var ar = [10, 20];
alert("First : " + ar);
//Method 1
ar.push(30); //Insert the value into the last position
alert("push(30) Inserted Last : " + ar);
//Method 2
ar.unshift(5); //Insert the value into the first position
alert("unshift(5) Inserted First : " + ar);
//Method 3 we can replace value into selected index
ar[1] = 100;
alert("ar[1] = 100 Replace to 1st index : " + ar);
}
</script>
</body>
</html>

Insert in Array JavaScript:- Geniusofstudent Insert in Array JavaScript:- Geniusofstudent

Insert in Array JavaScript:- Geniusofstudent

Reviewed by Network security on July 11, 2019 Rating: 5

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