JavaScript while Loops
While writing a program, there may be a situation when you need to perform
some action over and over again. In such situation you would need to write loop
statements to reduce the number of lines.
JavaScript supports all the necessary loops to help you on all steps of
programming.
The while Loop
The most basic loop in JavaScript is the
while loop which would be
discussed below.
Syntax:
Initialization;
while (expression/condition)
{
Statement(s) to be executed if expression is true
Updation;
}
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The purpose of a
while loop is to execute a statement or code block
repeatedly as long as
expression is true. Once expression becomes
false,
the loop will be exited.
Example:
Following example illustrates a basic while loop:
<script type="text/JavaScript">
<!--
var count = 0;
document.write("Starting Loop" + "<br />");
while (count < 10){
document.write("Current Count : " + count + "<br />");
count++;
}
document.write("Loop stopped!");
//-->
</script>
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