calulator using this

by John Kiran

JavaScript

let calculator = {
  read() {
    this.num1=+prompt("enter numbers","");
    this.num2=+prompt("enter numbers","");
  },
  sum() { return (this.num1+this.num2);},
  mul() {return this.num1*this.num2;},
};

calculator.read();
alert( calculator.sum() );
alert( calculator.mul() );