[C#] 리턴값(반환값) return key word

using System;

namespace MyFirstProgram
{
    internal class Program
    {
        static void Main(string[] args) // main method
        {

            int result1 = Multiply1(11, 12);
            double result2 = Multiply2(12.4, 13.7);

            Console.WriteLine(result1);
            Console.WriteLine(result2);
            Console.WriteLine(getMyName("jolab"));

        }

        static int Multiply1(int x, int y) {
            int z = x * y;
            return z;
        }
        static double Multiply2(double x, double y)
        {
            double z = x * y;
            return z;
        }
        static String getMyName(String name)
        {
            return name;
        }

    }
}