Posted on: November 6, 2009 at 12:00 AM
JavaScript Variables:
Variables are like containers, which contains a value. In JavaScript variables dependent on the value, not on the datatype that means variables are of dynamic typing. Variable names are case-sensitive and this should be start with either a letter or underscore.
We can use var statement to declare a variable as follows.
var x;
var variable;
We can assign any type of value at the time of declaration like:
var x=23;
var variable="string";
We can ignore the var statement at declaration time by assigning value to a variable.
x=23;
variable="string";
is same as the above given example
Example 1:
<html>
<head>
<title>
Variables in JavaScript
</title>
</head>
<body>
<script type="text/javascript">
var x=12;
document.write("Value of x is " + x);
y="String";
document.write("<br/> Value of y is " + y);
x="String type value";
document.write("<br/>New value of x is " + x);
y=343;
document.write("<br/>New value of y is " + y);
</script>
</body>
</html>
Output:
Value of x is 12
Value of y is String
New value of x is String type value
New value of y is 343
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