Javascript data types

Monday, 23 May 2016

Javascript data types

Data types in javascript

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:


JavaScript primitive data types

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

Data Type
Description
String
represents sequence of characters e.g. "hello"
Number
represents numeric values e.g. 100
Boolean
represents boolean value either false or true
Undefined
represents undefined value
Null
represents null i.e. no value at all

JavaScript non-primitive data types

The non-primitive data types are as follows:

Data Type
Description
Object
represents instance through which we can access members
Array
represents group of similar values
RegExp
represents regular expression

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