JAVASCRIPT push () to add one or more elements to the end of the array, and returns the new length. It is directly modify the array, rather than creating a new array. push () and pop () after using an array of advanced features offered out.
<!DOCTYPE html>
<html>
<head>
<Title> push () to add value to the specified array </ title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<script type="text/javascript">
var arr = new Array(3)
arr [0] = "Henan"
arr [1] = "Hebei"
arr [2] = "Jiangsu"
document.write ( "original array elements:" + arr)
document.write("<br />")
document.write ( "post-added element array length:" + arr.push ( "Jilin"))
document.write("<br />")
document.write ( "after the addition of numeric array:" + arr)
</script>
</body>
</html>