JavaScript Tutorials - Herong's Tutorial Examples
Dr. Herong Yang, Version 2.00

Creating an Array Object

<< Creating, Accessing, and Manipulating Arrays

<< JavaScript Tutorials - Herong's Tutorial Examples

This section provides a tutorial example on how to create array objects in JavaScript.

There are 3 ways to create a new array object:

1. Using the array literal - A new array object can be created by using the array literal syntax of [exp1, exp2, ...]. For example: 

   var colors = ["Red", "Green", "Blue"];
   var account = ["Saving", 999.99, true];

2. Calling the array constructor - A new array object can be created by calling the array constructor of (new Array(exp1, exp, ...)). For example: 

   var colors = new Array("Red", "Green", "Blue");
   var account = new Array("Saving", 999.99, true);

3. Calling the array function - A new array object can be created by calling the array function of (array(exp1, exp, ...)). For example: 

   var colors = Array("Red", "Green", "Blue");
   var account = Array("Saving", 999.99, true);

Here is a tutorial example JavaScript that shows you how to create new array objects: 

<html>
<!-- Create_Arrays.html
   Copyright (c) 2008 by Dr. Herong Yang, http://www.herongyang.com/
-->
<head><title>Create Arrays</title></head>
<body>
<pre>
<script type="text/javascript">

   // Using array literal
   var my_saving = ["Saving", 999.99, true];

   // Using array constructor
   var my_checking = new Array("Checking", 9.99, true);

   // Using array function
   var my_stock = Array("Stock", 99999.99, true);

   // Creating an empty array
   var new_account = [];

   document.write(my_checking[0]+": "+my_checking[1]+"\n");
   document.write(my_saving[0]+": "+my_saving[1]+"\n");
   document.write(my_stock[0]+": "+my_stock[1]+"\n");
   document.write(new_account[0]+": "+new_account[1]+"\n");
</script>
</pre>
</body>
</html>

The output of this sample JavaScript is: 

Checking: 9.99
Saving: 999.99
Stock: 99999.99
undefined: undefined

Sections in This Chapter

What Is an Array?

Creating an Array Object

Accessing Array Elements with Indexes

Truncating and Iterating Array Elements

Array Object Instance Methods

Array Object Instance Method Examples

Dr. Herong Yang, updated in 2008
Creating an Array Object