JavaScript/dataTypes.js at main · MMH-org/JavaScript · GitHub

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"use strict"; //  treat all Js Code as newer version

// alert()  // we are useing node js ,not browser

console.log("Data Types");

let name ="Md Mohsin Haider";
let age = 22;
let isLoggedIn= false;

// number  => to power 53;
// BigInt
// String =" "
// Boolean = true/false
// null=>  standalone value / specel type its blank
// undefined =>
// Symbol => unique

// boject
// typeof
// console.table([age,name,isLoggedIn]);
// console.log(typeof null); // object
// console.log(typeof undefined); // undefined


// 🟥🟥🟥🟥🟥🟥🟥🟥🏳️🏳️🏳️🏳️🏳️🏳️🏳️🏳️🏳️🟥🟥🟥🟥Primitiv

// 7 types :  String, Number ,boolean ,null ,undefined, Symbole, BigInt


// const score:number=100  Type script
// const score=100; // in JavaScript


// const id =Symbol('123');
// const anotherId= Symbol('123');
// console.log(id === anotherId); //false
// console.log(id == anotherId); //false

// const bigNumber= 123456789097654323456789875687647678363853686863863863n; // how to use

//  Reference (Non prrimitive)
//  Array,Objects, Funtion

// const hero= ["shaktiman","naagraj","doga"]; // Array


// let myObject={
//     name:"md mohsin haider",
//     age:22,
// }


// const myFunction = function (){

//     console.log("Hello world");
// }


// console.log(typeof(Object));


// 🟥🟥🟥🟥🟥🟥🟥🟥🟥🟥🟥🟥🟥🟥🟥🟥🟥🟥🟥🟥🟥🟥🟥🟥🟥🟥🟥🟥🟥🟥🟥🟥🟥🟥🟥

// Stack (Primitive),
// Heap (Reference (Non prrimitive))

let mychannel = "RedCode";
let anothername = mychannel;
anothername="chaiaurcode";

// console.log(mychannel);
// console.log(anothername);