Page 201 - Web Applications (803) Class 12
P. 201
document.write(i*i+", ");
}</script>
</font>
</body> </html>
Output of the preceding program is as follows:
3.9 ARRAYS IN JAVASCRIPT
An array is a special variable, with the capacity to hold several values. Syntax:
const array_name = [element1, element2, ...];
It is a common practice to declare arrays with the const keyword.
Creating Arrays
1. The simplest way of creating an array is using the array literal:
const animals = ["lion", "tiger", "giraffe", "elephant"];
2. You can also create a blank array, and then specify the elements:
const birds = [];
birds[0]= "pigeon";
birds[1]= "sparrow";
cars[2]= "eagle";
3. Using the keyword new:
const currency = new Array("Dollar", "Yen", "Pound");
Accessing Array Elements
Array elements can be accessed using the respective index value.
lion tiger giraffe elephant
Index value 0 1 2 3
Let us understand through an example:
<html>
<body text="red">
<h2>Accessing array elements</h2>
<font color=blue>
<script>
const cars = ["Ferrari", "WagonR", "BMW"];
document.write("Element 2 is " + cars[1]);
//element values can be changed
Web Scripting—JavaScript 199

