Adding elements to an array

We can add new elements at the end of the array by using push() method. This way array length increases. Here is the syntax to add elements to an array.
scripts.push("VBScript","Perl");
scripts is the array to which we added two more elements.

This way we can add new elements to an existing array.

Here is the complete code.

<script type="text/javascript">
var scripts = new Array();
scripts[0] = "PHP";
scripts[1] = "ASP";
scripts[2] = "JavaScript";
scripts[3] = "HTML";
document.write(scripts.join(" <br> "));
document.write("<br>--Now after applying push()--<br>");
scripts.push("VBScript","Perl");
document.write(scripts.join(" <br> "));
</script>
Adding elements at the starting of an array by using unshift() method

The above code will add VBScript and Perl at the end of the array and display the full list.

Numeric Keys

The assigned numeric keys are remain same after applying push()
<script type="text/javascript">
var scripts = new Array();
scripts[0] = "PHP";
scripts[1] = "ASP";
scripts[2] = "JavaScript";
scripts[3] = "HTML";

scripts.push("VBScript","Perl");
for (var key in scripts) {
  document.write("key : " + key + "  =>value: " + scripts[key] + "<br>");
}
</script>
Output is here
key : 0 =>value: PHP
key : 1 =>value: ASP
key : 2 =>value: JavaScript
key : 3 =>value: HTML
key : 4 =>value: VBScript
key : 5 =>value: Perl

add or remove elements at any position of an array by using splice method


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