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Data Types In Javascript

1. Numbers
2. Strings
3. Booleans
4. Objects
5. Arrays
6. Null
7. Undefined

Numbers

var x = 2;
var y = 1.3;

Strings

var name = "gyan";

Booleans

var status = true;

Objects

1. Has properties like name, age etc. (in humans).
2. Performs actions like eat, move, sleep etc. (in humans).

var obj = {};

Arrays

var array = [1, "test", 3];

Null

var x = null;

Undefined

var x;
alert(x);