Thursday, December 6, 2012

Javascript for Loop

The for loop is the most compact form of looping and includes the following three important parts:

  1. The loop initialization where we initialize our counter to a starting value. The initialization statement is executed before the loop begins.
  2.  The test statement which will test if the given condition is true or not. If condition is true then code given inside the loop will be executed otherwise loop will come out.
  3.  The iteration statement where you can increase or decrease your counter.

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Javascript While Loop

While programming, there might be situation that you need to execute a block of code for a given number of times, in these situation while loop can be used.

The while loop executes code while a condition is true.

Syntax:
while (expression){
   Statement(s) to be executed if expression is true
}

 
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>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Siple Javascript conditions</title>
</head>

<body>
<button onclick="myLoop()">Click Me</button>
<script>
function myLoop()
{
var count=0;

while(count <=10)
{
document.write("Number: "+count+"<br/>");   
count ++;
}


}
</script>
</body>
</html>
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