JavaScript provides different data types to hold different types of values. There are two types of data types in JavaScript.
- Primitive data type
- 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 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 |
We will have great discussion on each data type later.
