Write a JavaScript program to print html heading from <h1> to <h6> using while loop.
<html>
<head>
<title>HTML headings</title>
</head>
<body>
<script type="text/javascript">
var i = 1;
while(i <=6 )
{
document.write("<H" + i + "/>This is heading " + i + "</H" + i + ">");
i++;
}
</script>
</body>
</html>
