using System;

public class Program

{

    public void Main()

    {

        Pi();

        Sterren();

        Maaltafel();

    }

​

​

    void Pi()

    {

        float fTeken = 1f;

        float fResult = 0;

        for(int i = 1; i <= 214748364; i = i + 2)

        {

            float fBreuk = 1f/i;

            fResult = fResult + (fTeken * fBreuk);

            fTeken = fTeken * -1f;

        }   

        fResult = fResult * 4f;

        Console.WriteLine(fResult);

    }

​

​

​

    void Sterren()

    {

        string strSter = "";

        for (int i = 0; i < 4; ++i)

        {

        strSter = strSter + "*";

        Console.WriteLine(strSter);

        }

​

    }   

    void Maaltafel()

    {

        int intGetal = 6;

        for(int i = 0; i < 11; ++i)

        {

        Console.WriteLine(intGetal * i);

        }   

    }   

​

​

    void 

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

}