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console.log("Welcome to JavaScript Tutorial!");

// variables in javascript

var v1 = 23;

const v3 = 9.31;

let v2 = "Welcome";

// Data Type in Javascript

let n = 34; // Integer

console.log(typeof (n));

let s = "javascript"; // String

console.log(typeof (s))

let pi = 3.14; // float

console.log(typeof (pi));

let isLoggedIn = true; // boolean

console.log(typeof (isLoggedIn));

let undef; // Undefined

console.log(typeof (undef));

let _null = null; // NULL

console.log(typeof (_null));

let student = {

name: "XYZ",

roll_no: 4,

course: "BCA"

};

console.log(student);

console.log(typeof (student));