I need help with my simple calculator!

Question

I just started learning C# and i wanted to build a simple calculator but I keep getting error messages

 

 The error message I keep getting is :
Error CS0165 Use of unassigned local variable 'result'

class Program
    {
        static void Main(string[] args)
        {




            int num01 = Convert.ToInt32(Console.Read());
            char method = Console.ReadKey().KeyChar;
            int num02 = Convert.ToInt32(Console.Read());
            int result;


            switch (method)
            {
                case '+':
                    result = num01 + num02;
                    break;
                case '-':
                    result = num01 - num02;
                    break;
                case '%':
                    result = num01 % num02;
                    break;
                case '*':
                    result = num01 * num02;
                    break;
                default:
                    Console.WriteLine("???");
                    break;
            }

            Console.WriteLine("The answer is " , result);

            Console.ReadKey();


        }


    }