<!DOCTYPE html>
<html lang="en-US">
<body>
<script>
var num = new Number(36);
var str = new String("hello");
var bool = new Boolean(true);
var arr = [1, 2, 3];
var obj = {bike:"honda", color:"red"};
var txt = "";
txt += "num : "+ (num instanceof Number) + "<br>";
txt += "str : "+ (str instanceof String) + "<br>";
txt += "bool : "+ (bool instanceof Boolean) + "<br>";
txt += "arr : "+ (arr instanceof Array) + "<br>";
txt += "obj : "+ (obj instanceof Object) + "<br>";
document.write(txt);
</script> </body>
</html>