What is the use of javascript push() method?

In JavaScript, the push() method can add one or more elements to the end of the array and return the new length; syntax "array.push(element 1, element 2, ..., element n )". The push() method directly modifies the array and changes the length of the array, rather than creating a new array.

The operating environment of this tutorial: windows7 system, javascript version 1.8.5, Dell G3 computer.

JavaScript push() method

push() method adds one or more elements to the end of the array and returns the new length .

Note: New elements will be added at the end of the array.

Note: This method changes the length of the array.

Syntax:

array.push(item1, item2, ..., itemN)

Parameters	Description
item1, item2, ..., itemN	Required. The element to add to the array.

Return value: new length of array

Example:

<script type="text/javascript">
var arr = new Array(3)
arr[0] = "George"
arr[1] = "John"
arr[2] = "Thomas"
document.write(arr + "<br />")
document.write(arr.push("James") + "<br />")
document.write(arr)
</script>

Output:

George,John,Thomas
4
George,John,Thomas,James

[Recommended learning: javascript advanced tutorial]

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