DataTypes in javaScript

1. what is a dataType means

   It means that kind of data requried for a particular action in programming language different type of datatypes in js described below:-

2. Primitive

   Numeric(any number like1,2,3etc..),Boolean(true,false),Null,Undefined,String("")

3. Non-Primitive

   Array([])(contains key value set where key is index and the value any dataType),Objects({}(key is string and value can be any dataType))

Examples:-

Numeric

let n = 123;
n = 12.345;

String

let str = "Hello";
let str2 = 'Single quotes are ok too';

Boolean

let nameFieldChecked = true; // yes, name field is checked
let ageFieldChecked = false; // no, age field is not checked

Null

let age = null;

Undefined

let x;

alert(x); // shows "undefined"

Array

let fruits = ["Apple", "Orange", "Plum"];

Objects

let user = {     // an object
  name: "John",  // by key "name" store value "John"
  age: 30        // by key "age" store value 30
};