Introduction

There are two types of Data Types available in JavaScript:

1. Primitive Data Type

2. Non-Primitive Data Type

Primitive Data Types

Primitive Data Type refers to the Data Type in which data doesn't contain any object or method. For example- Number, String, Boolean, Symbol, Null, etc.

• String: It refers to the sequence of characters that are present inside single or double quotes. For example-

var str1 = 'This is String 2';
var str2 = "This is String 1";

• Number: It represents data in numerical form. For example-

var a = 100;
var b = 20.1;

• Boolean: It represents a statement either as false or true. For example-

var x = 12;
var y = 12;
var z = 13;
console.log(x == y); //gives output as true
console.log(y == z); //gives output as false

• Undefined: It is used when the user wants to declare a variable but doesn't want to assign any value to it. For example-

var a; //method 1
var b = undefined; //method 2

• Null: It represents an invalid value. For example-

var value = null;

Non-Primitive Data Types

Non-Primitive Data Type refers to the Data Type which can store multiple and complex values.

• Object: It is used for storing a collection of data items. For example-

 var obj1 = {
      a: 10, //stores data in Number
      b: 'Hi!', //stores data in String
      c: function(){
          return 'This is a JavaScript Object';
      }
}

• Array: It is used for storing multiple Data Items under a single variable name. For example-

var arr = ['Hi',21,3.2,false];

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