let _id; // Implicit Declearation
let fb_id: any; // Explicit Declearation
fb_id = true;
fb_id = 23423523;

const firstName = "Riyad";
const lastName: string = "Hossain";
let isLoading: boolean;
isLoading = false;

let roll: string | number = 423;
roll = "423";

let device: string | number | boolean; // Union Type
device = "Mobile";
device = 4323523;

const re: RegExp = /\w+/g;

console.log("hello")

hello

interface Point {
  x: number;
  y: number;
}
 
function logPoint(p: Point) {
  console.log(`${p.x}, ${p.y}`);
}
 
// logs "12, 26"
const point = { x: 12, y: 26 };
logPoint(point);

12, 26