Wednesday 21 March 2012

For loop in Javascript

Definition: For Loop
 Syntax:
for (variable=startvalue;variable<=endvalue;variable=variable+increment)
{
code to be executed

}

startvalue = from which value your loop will start. here it is starting from 0.
endvalue = upto how much time loop to execute.

The example below defines a loop that starts with i=0. The loop will continue to run as long as i is less than, or equal to 5. i will increase by 1 each time the loop runs.

It is same as "For Loop" in our C language.
 
Example:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title>For Loop</title>
    <script type="text/javascript">
        var i=0;
        for (i=0;i<=5;i++)
        {
            document.write("Hello World " + i);
            document.write("<br />");
        }
</script>
</head>
<body>

</body>
</html>

Output:

Hello World 0
Hello World 1
Hello World 2
Hello World 3
Hello World 4
Hello World 5

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