using System;

public class Program

{

    public static void Main()

    {

        while(true)         

        {

            Console.WriteLine("Name eingeben:");

            string Name = Console.ReadLine();

            Console.WriteLine("Grösse eingeben:");

            float height = float.Parse(Console.ReadLine());

            Console.WriteLine("Gewicht eingeben:");

            float weight = float.Parse(Console.ReadLine());

            float bmi = CalculateBMI(weight, height);

            Console.WriteLine(Name + "'s bmi: "+bmi);                   

        }

​

​

    }

    static float CalculateBMI(float weight,float height = 1.80F)

    {

        return weight / (height * height);

    }

}

​