Java Script Data Types

JavaScript provides different data types to hold different types of values. There are two types of data types in JavaScript.

  1. Primitive data type
  2. Non-primitive (reference) data type

JavaScript is a dynamic type language, means you don’t need to specify type of the variable because it is dynamically used by JavaScript engine. You need to use var here to specify the data type. It can hold any type of values such as numbers, strings etc. For example:


           var a=40;              //holding number  

           var b=“Rahul”;   //holding string  

JavaScript Primitive data types

There are five types of primitive data types in JavaScript. They are as follows:


     Data TypeDescription
     Stringrepresents sequence of characters e.g. “hello”
     Numberrepresents numeric values e.g. 100
     Booleanrepresents Boolean value either false or true
    Undefinedrepresents undefined value
     Nullrepresents null i.e. no value at all

JavaScript Non-Primitive data types

The non-primitive data types are as follows:

   Data TypeDescription
    Objectrepresents instance through which we can access members
     Arrayrepresents group of similar values
     RegExprepresents regular expression