BasicJavaScript_1.js

// Ryan Dahl is the founder of Node.Js and Deno.

/* Variable => 3 types of Variables { const[not changeable],let[more useable in js] and var[it's better not to use] } */

// Variable Define{ var, let, const }

/* 
Prefer to not use of " var --Variable " ,because of in issues in "block and functional scope" . "Use strict!";Treat all JS code as newer version.
*/

/*
var name="Arafat"
alert(name);
var first_name="Al-"
var last_name="Arafat"
alert(first_name + last_name);
*/

/*
alert( 3 + 3);
 We are using node.js,not browser.
*/

/*
alert ('Allah Is Great.');
console.log ('Allah is great');
document.write ("Allah blesses you");
document.write ("<h1>Allah blesses you</h1>");
document.getElementById("May Allah  bless you");
document.getElementById("demo");
*/
/*
 name1="Arafat";
 cell='01754545335';
email='alarafatyeashgmail.com';
website="www.arafat.com"; 
var name1="Arafat";
var cell='01754545335';
var email='alarafatyeashgmail.com';
var website="www.arafat.com";
let name1="Arafat";
let cell='01754545335';
let email='alarafatyeashgmail.com';
let website="www.arafat.com";
const name1="Arafat";
const cell='01754545335';
const email='alarafatyeashgmail.com';
const website="www.arafat.com"; 

console.log("Person Name"+name1+'Person Cell'+cell+email+website);
*/

// const { StrictMode } = require("react");

                        // Main Parts Start Here...
const accountId = 15344
accountId = 2 //not allowed for constant,because it's not changeable.
let accountEmail = " arafatgmail.com "
accountEmail = " arfangmail.com "
var accountPassword = " 1545645 "
 accountPassword = " 1545 "
accountCity = "Demra"
 accountCity = " Dhaka "

console.log(accountId); //It's used to "Execute" this program.
console.log("Arafat");
/*
console.log(3
     +
     3);
*/
// Please stay out of this kind of code,because of  readability should be high.


 let accountState; //Undefined
console.table( [ accountEmail, accountPassword, accountCity, accountState ] );