how to sum a 2 num

function Code(num1) {
  return {
    sum(num2) {
      return num1 + num2;
    },

    subtract(num2) {
      return num1 - num2;
    },

    multiply(num2) {
      return num1 * num2;
    },

    divide(num2) {
      return num1 / num2;
    },
  };
}

const result = Code(5);

console.log("Sum:", result.sum(5));
console.log("Subtract:", result.subtract(5));
console.log("Multiply:", result.multiply(5));
console.log("Divide:", result.divide(3));

Explanation

This solution uses the Factory Function pattern along with Closures.

A factory function is a function that creates and returns an object containing properties and methods. Each time the function is called, it returns a new object.

In this example:

1. Code(5) is called, where num1 is 5.
2. The outer function returns an object with four methods: sum(), subtract(), multiply(), and divide().
3. We store the returned object in the result variable.
4. We then call the object's methods and pass another value (num2) to perform different operations.

The interesting part is that all of these methods can still access num1 even after the Code() function has finished executing. This happens because of closures. Each method "remembers" the value of num1 from its outer scope.

Concepts Used

• ✅ Factory Function
• ✅ Closure
• ✅ Lexical Scope
• ✅ Object Methods
• ✅ Encapsulation (keeping num1 private inside the closure)