<!DOCTYPE html>
<html>
<head>
<title>Variables Demo-aimtocode.com</title>
<script type="text/javascript">
var a ="This is a";
document.writeln(a);
a = "This is a string"
document.writeln(a)
a = 67;
document.writeln(a)
</script>
</head>
<body>
</body>
</html>