using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Welcome to my calculator!");

        Console.Write("Type a number(1: addition 2: subtraction)");

        string operation = Console.ReadLine();

        ifstatments(operation);

    }

    public static void addition()

    {   

        Console.Write("What is the first number...");

        string num1 = Console.ReadLine();

        Console.Write("What is the secomd number...");

        string num2 = Console.ReadLine();

        try{

        int intnum = Int32.Parse(num1);

        int intnum2 = Int32.Parse(num2);

        int nummain = intnum + intnum2;

        Console.WriteLine(nummain);

        }catch{

            Console.WriteLine("Thats not a number!");

        }

    }

    public static void subtraction()

    {

    }

    public static void ifstatments(string operation)

    {

        if(operation == "1")

        {

            addition();

        }

    }

}