3.datatypes

by John Kiran

HTML

<html>
<head>

</head>
<body>

</body>
</html>

JavaScript

"use strict";
//it shows infinity alert
alert(1/0);
//it shows nan alert
alert("not a number"/0);

//boolean
let isGreater=4>1;
alert("boolean: "+isGreater);

//null
let age=null;
alert(age);

//task in javascript.info
let name="kiran";
alert(`hello ${1}`);

alert(`hello ${"name"}`);

alert(`hello ${name}`);

//typeof
alert(typeof name);
alert(typeof 0);
alert(typeof "test");
alert(typeof alert);