// == `math.js` == //

function add(num1: number, num2: number): number {
  return num1 + num2;
};
// This is how we export the `add()` function in CommonJS
exports.add = add;

function sub(num1, num2) {
  return num1 - num2;
}

var two: number = add(1, 2);
var one: number = sub(2, 1);