# Data Types in JavaScript!!!

Every Programing language has some built-in data structures, but these data structures differ from one language to another.

Today we are going to talk about JavaScript data types. 


![giphy.gif](https://cdn.hashnode.com/res/hashnode/image/upload/v1656482441122/72_O1JNFE.gif align="left")

There are two types of data structures in JavaScript.

 Primitive Data Types  
  - String
  -  Number
  -  Boolean
  -  BigInt
  -  Undefined
  -  Null
  -  Symbol

Non-Primitive Data Types
  - Object

## String

String type is used for **storing text**. Strings can be surrounded by quotes.

For example:
```
const a = 'Hello world!'; //single quotes
const b = "Hello World!" //double quotes
const c =`My first line of code was ${a}` //backticks

//we can also find the length of a string by using the built-in length property

const len = c.length;

``` 

## Number 

Number type is used for storing both **integer and floating-point numbers**.

For example:

```
const x = 5;
const y = 5.567;
const z =3e-2;

``` 
## Boolean

Boolean type represents any values ** true or false**.

For example:

```
const a = true;
const b = false;
``` 
## BigInt

 BigInt type represents any values or numbers less than (253 - 1). BigInt primitive, created by appending n to the end of an integer literal, or by calling the BigInt().

For example:

```
const bigNumber = BigInt(12346574987646987987987648)

//output: 12346574987646987233394688n

const bigHexNumber = BigInt("0x2fffffffffffff")

//output 13510798882111487n

const largeBinary = BigInt("0b11111111111111111111111111111111111111111111111111000")

//output 9007199254740984n

``` 
## Undefined

Undefined is a type whose value s not initialized.

For example:


```
const x;
//output undefined
``` 
## Null 

The null type represents a special value that is empty or unknown. 

For example:


```
const x = null; // null is not same as NULL or Null

//output null

``` 

## Symbol
A Symbol is a type that represents unique and immutable. In some programming languages, it is called "atoms".

For example:

```
const sym = Symbol("Hello")

//output  Symbol(Hello)
``` 
## Object

An object is a non-primitive complex data type. It is used to store collections of data.


```
const obj ={
    firstName:"Jhonny",
    lastName:"Depp",
    age:58,
   phoneNumber:null,
}
//to see the output

console.log(obj)
``` 
To find the type of a variable we can use **typeof**

For example:

```
const a = "Hello world"
console.log(typeof(a)) //output string

const b = 58
console.log(typeof(b)) //output number

const c = null
console.log(typeof(c)) //output object because null is "nothing". It is supposed to be something that doesn't exist. Unfortunately, in JavaScript, the data type of null is an object
``` 

Thank You very much for reading this article!!!❤️

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