Explain how to use the while loop of JavaScript, javascriptwhile

Explain how to use the while loop of JavaScript, javascriptwhile

When writing a program, you may need to perform operations over and over again. In this case, you need to write loop statements to reduce the number of codes.

JavaScript supports all the necessary loops to help you in all programming steps.
While Loop

The most basic loop in JavaScript is the while loop, which will be discussed in this tutorial.
Syntax

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

The while LOOP aims to execute statements or code blocks repeatedly (as long as the expression is true ). Once the expression is false, the loop is exited.
Example:

The 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>

This produces the following results:

Starting LoopCurrent Count : 0Current Count : 1Current Count : 2Current Count : 3Current Count : 4Current Count : 5Current Count : 6Current Count : 7Current Count : 8Current Count : 9Loop stopped! 

 
Do... while loop:

Do... while loop is similar to a while loop. The difference is that the condition check occurs at the end of the loop. This means that the loop will always be executed at least once, even if the condition is false.
Syntax

do{  Statement(s) to be executed;} while (expression);

Note: Use a semicolon at the end of the do... while loop.
Example:

For example, in the above example, write a program that uses the do... while loop.

<script type="text/javascript"><!--var count = 0;document.write("Starting Loop" + "<br />");do{ document.write("Current Count : " + count + "<br />"); count++;}while (count < 0);document.write("Loop stopped!");//--></script>

This produces the following results:

Starting LoopCurrent Count : 0Loop stopped!