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JavaScript Array Object
In this JavaScript tutorial, you will learn about JavaScript Array Object, its properties and methods.
Usage of the Array Object:
The Array object is used to store a set of values in a single variable name.
There are many operations involved with Array object:
- Defining Array object
- Adding Values to Array
- Accessing Array
- Editing or Modifying the Values of an Array
These topics have been addressed in previous sections on Arrays in JavaScript.
In this section, the properties and methods of Array Object in JavaScript will be outlined.
Properties of array Object:
length:
The length property of an array object returns the number of elements in an array.
General Syntax of length property of an array Object in JavaScript:
For example:
<html>
<body>
<script type="text/javascript">
var exforsys = new Array(2)
exforsys[0] = "Good"
exforsys[1] = "Best"
document.write("Old value of length:" + arr.length)
document.write("<br />")
arr.length=4
document.write("Modified value of length:"+arr.length)
</script>
</body>
</html>
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The output of the code above will be:
Old value of length: 2
Modified value of length: 4
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index Property :
The index Property is a read-only property and this gives the index of the Array Object.
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