// This program reads in a value and outputs its square root.
// It outputs an error message if the data value is negative.
// Barry Cornelius, 3 June 2000
import java.io. BufferedReader;
import java.io. InputStreamReader;
import java.io. IOException;
public class Sqrt2
{
   public static void main(final String[] pArgs) throws IOException
   {
      final BufferedReader tKeyboard =
                    new BufferedReader(new InputStreamReader(System.in));
      System.out.print("Type in a value: ");
      System.out.flush();
      final String tLine = tKeyboard.readLine();
      final double x = Double.parseDouble(tLine);
      if (x>=0.0)
      {
         final double tSqrtX = Math.sqrt(x);
         System.out.print("The square root of this value is: " + tSqrtX);
      }
      else
      { 
         System.out.print("This value is negative");
      }
      System.out.println();
   }
}