Javascript while loop TUTORIAL


While Loop


The JavaScript while loop consists of a condition and the statement block.

while (condition)
   {
   ...statements...
   }

The condition is evaluated. If the condition is true the statements are evaluated. If the statement is false we exit from the while loop.

Let us take a simple example below that prints the number from 0 to 10.

<html>
<body>
<script type="text/javascript">
<!--
/*
********************************************************
Example While loop
********************************************************
*/
var i=0;
while (i<=10)
{
document.write("The number is " + i);
document.write("<br />");
i=i+1;
}
//-->
</script>
</body>
</html>


The example defines the while loop that starts with i=0. The loop will continue to run as long as i is less than, or equal to 10. The value of i will increase by 1 each time the loop runs.

You can try this example online at the link below, which will open in a new window.

Javascript while loop - Example