using System;

public class Program

{

    public static void Main()

    {

        // VARIABLE

        // TYP BEZEICHNER = WERT

        string vorname = "Caroline";

        Console.WriteLine("Hello " + vorname);

        vorname = ReturnSomeName("Mueller");

        CalculateSurfaceAreaOfRectangle();

        Console.WriteLine("area");

        // METHOD

        // TYP BEZEICHNER(PARAMETER1, PARAMETER2, ...)

        string ReturnSomeName(string Nachname)

        {

            // ...

            return "Max" + Nachname;

        }

        void CalculateSurfaceAreaOfRectangle()

        {

            float a = 4;

            float b = 2.1f;

            float area;

            area = a * b;

        }

    }

}