yogeshkoli

var Calculation = /** @class */ (function () {
    function Calculation(x, y) {
        this.x = x;
        this.y = y;
    }
    Calculation.prototype.add = function () {
        console.log(this.x + this.y);
    };
    return Calculation;
}());

yogeshkoli

class Calculation {
  constructor(private x: number, private y: number) {}

  add() {
    console.log(this.x + this.y);
  }
}

let calc = new Calculation(10, 20);