Edit in JSFiddle

//set the value of 'i' to 0; loop while 'i' is less than 10; increment 'i' by 1 every time it loops

var i = 0;

while(i < 10){
	document.getElementById("output").innerHTML += "We are on number " + (i+1) + "<br />";
  i++;
}
<!-- Easy JavaScript #24 - the while loop-->
<p>
Welcome to the 24th Easy JavaScript tutorial, part of <a href="http://www.easyprogramming.net" target="_blank">EasyProgramming.net</a>. This tutorial covers the <code>while</code> loop!
</p>
<p>
The <code>while</code> loop  allows you to run a block of code as long as a specific condition is true. 
</p> 
<h2>
Syntax of the <code>while</code> loop:
</h2>

<pre>
  while (condition is true) {
    code to be executed
  }
</pre>

<h3>Output:</h3>
<p>
<span id="output"></span>
</p>
<p>
W3Schools: <a href="http://www.w3schools.com/js/js_loop_while.asp" target="_blank">http://www.w3schools.com/js/js_loop_while.asp</a>
</p>