What are datatypes In Javascript? – Best way to Learn Javascript Online!

Hey there, how are you? Is everything fine? Hopefully,  you are saying yes. But for those who are saying no, I can only pray to happen all the things fine.

Today I am with a new Javascript tutorial that is on – “Datatypes in Javascript.”

Have you heard about the work Datatype before? Yes for sure if you have learned any other programming language. Datatype, as it name say that its a type of data. Means which type of value is going to be stored in a variable, is pointed through this datatype. But in Javascript, it’s not the case. Want to know how? Go ahead!

Javascript is a dynamic type programming language. You don’t have to specify any datatype to hold the value. In javascript, you have to just type var and the name of a variable. It will automatically be fetched up by the Javascript Engine. It can hold any type of value like number, string etc. e.g.

var name  = "Pooja"; // holding string valuevar rollno = "45"; // holding number value

We have two types of Datatypes in Javascript:

  1. Primitive Datatypes
  2. Non-primitive datatypes.

List of primitive datatypes in Javascript:

  1. String
  2. Number
  3. Boolean
  4. Undefined
  5. Null

Are you expecting explaination from me? Yes, okay I will definitely provide you. Relax

String is a datatype that holds the sequense of character.

Number is a datatype that holds the number value like 0,1,2, etc.

Boolean is a datatype that return only two values true or false. And unidefined represents the undefined value like which is not defined or declared.

Null holds no value.

Now its turn for non-premetive datatypes. Let’s get started with it too.

I am providing the list of non-premitive datatypes here:

  1. Object
  2. Array
  3. RegExp

Let me tell you in very short the use of above three.

Object is an instance through which we can access members.

Array represents a group of similer values.

RegExp is a like a mix mode. e.g. care@codingparks.com.

Example of Javascript variables is given below:

Javascript Code Placement inside . Learn JavaScript with Rahul Rahi. Get best, top and easy JavaScript tutorials online.

Javascript Code Placement inside.

JavaScript Reserved Words

A list of all the reserved words in JavaScript are given in the following table. They cannot be used as JavaScript variables, functions, methods, loop labels, or any object names.

abstract

boolean

break

byte

case

catch

char

class

const

continue

debugger

default

delete

do

double

else

enum

export

extends

false

final

finally

float

for

function

goto

if

implements

import

in

instanceof

int

interface

long

native

new

null

package

private

protected

public

return

short

static

super

switch

synchronized

this

throw

throws

transient

true

try

typeof

var

void

volatile

while

with

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