Write a JavaScript program to display full name of user.
<html>
<head>
<title>Joining a String</title>
</head>
<body>
<script>
var firstString = "Rahul";
var secondString = "Tamkhane";
var space = ' ';
var newString = firstString + space + secondString;
alert(newString);
</script>
</body>
</html>
