1. variable.js

// 01. Create a variable.js file and declare variables and assign string, boolean, undefined and null data types, Display all the value with their data type.

// We can declare variable using the keywords let, var and const.

// String
let myName = "Sayantan";
console.log(myName, `Type of this variable is ${typeof myName}`);

// Boolean
let x = true;
let y = false;

console.log(x, `Type of this variable is ${typeof x}`);
console.log(y, `Type of this variable is ${typeof y}`);

// Undefined
let role = undefined;
console.log(role, `Type of this variable is ${typeof role}`);

// Null
let z = null;
console.log(z, `Type of this variable is ${typeof z}`);