Console_Calculator

using System;

namespace P03_Calculations {
    class Program {
        static void Main(string[] args) {
            string command = Console.ReadLine();
            int numOne = int.Parse(Console.ReadLine());
            int numTwo = int.Parse(Console.ReadLine());

            switch(command) {
                case "add":
                    Console.WriteLine(Add(numOne, numTwo));
                    break;
                case "multiply":
                    Console.WriteLine(Multiply(numOne, numTwo));
                    break;
                case "subtract":
                    Console.WriteLine(Subtract(numOne, numTwo));
                    break;
                case "divide":
                    Console.WriteLine(Divide(numOne, numTwo));
                    break;
                default: break;
            }
            Add(numOne, numTwo);
            Multiply(numOne, numTwo);
            Subtract(numOne, numTwo);
            Divide(numOne, numTwo);
        }
        private static int Divide(int numOne, int numTwo) { return numOne / numTwo; }
        private static int Subtract(int numOne, int numTwo) { return numOne - numTwo; }
        private static int Multiply(int numOne, int numTwo) { return numOne * numTwo; }
        private static int Add(int numOne, int numTwo) { return numOne + numTwo; }
    }
}