2Datatype.js

/* Datatypes in javascript
a - Undefined: typeOf instance === "undefined"
b - Boolean: typeOf instance === "Boolean"
c - Number: typeOf instance === "number"
d - String: typeOf instance === "string"
e - BigInt: typeOf instance === "bigint"
f - Symbol: typeOf instance === "symbol"
*/
var myName = "Kuldeep Singh";
console.log(myName);
console.log(typeof (myName))

var iAmKul = true;
console.log(iAmKul);
console.log(typeof (iAmKul));

var iAmKul1 = 90;
console.log(iAmKul);
console.log(typeof (iAmKul1));

// Some challenge.
console.log(10 + "20");
console.log(10 - "20");
console.log("Java" + "Script");
console.log(" " + " ");
console.log(" " + 0);
console.log("Kuldeep " + "Singh");
console.log(true + true);
console.log(true + false);
console.log(false + false);
console.log(false + true);

/*
    Output
    Kuldeep Singh
    string
    true
    boolean
    true
    number
    1020
    -10
    JavaScript

    0
    Kuldeep Singh
    2
    1
    0
    1
*/