/**
 * Calculator Module
 * Pure functions for basic arithmetic operations
 */

/**
 * Adds two numbers
 * @param {number} a - First number
 * @param {number} b - Second number
 * @returns {number} Sum of a and b
 */
const add = (a, b) => a + b;

/**
 * Subtracts second number from first number
 * @param {number} a - Number to subtract from
 * @param {number} b - Number to subtract
 * @returns {number} Difference of a and b
 */
const subtract = (a, b) => a - b;

/**
 * Multiplies two numbers
 * @param {number} a - First number
 * @param {number} b - Second number
 * @returns {number} Product of a and b
 */
const multiply = (a, b) => a * b;

module.exports = {
  add,
  subtract,
  multiply,
};