//   Folge.java 
import java.io.*;
public class Folge
{
   public static void main(String[] args) throws IOException
              {
              double x=2.0,a=2.0;
              for (int k=0; k<=9; k++)
                  {
                  System.out.println("k = "+ k +"         a_k = "+ a);
                   a=0.5*(a+x/a);   // Heron-Iteration
//                  a=Math.sqrt(k*k+3.0*k)-k;
//                  System.out.println(Double.MAX_VALUE);
                  }
              }
}