javascript

 

var calculator = (function() {
  function add(a, b) {
    return a + b;
  }

  function subtract(a, b) {
    return a - b;
  }

  function multiply(a, b) {
    return a * b;
  }

  return {
    add: add,
    subtract: subtract,
    multiply: multiply
  };
})();

console.log(calculator.add(2, 3)); // 5
console.log(calculator.subtract(5, 2)); // 3
console.log(calculator.multiply(4, 3)); // 12

var myFunctions = {
  add: function(a, b) {
    return a + b;
  },
  subtract: function(a, b) {
    return a - b;
  },
  multiply: function(a, b) {
    return a * b;
  }
};

// 사용 예제
console.log(myFunctions.add(2, 3)); // 5
console.log(myFunctions.subtract(5, 2)); // 3
console.log(myFunctions.multiply(4, 3)); // 12