Loops execute a block of code a specified number of times, or while a specified condition is true.
The while Loop.
The while loop loops through a block of code while a specified condition is true.
Syntax.
while (var<=endvalue)
{
code to be executed
}
Note: The <= could be any comparing statement.
Example.
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:
Example.
<html>
<body>
<script type="text/javascript">
var i=0;
while (i<=5)
{
document.write("The number is " + i);
document.write("<br />");
i++;
}
</script>
</body>
</html>>
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