// @author Frank M. Carrano, Timothy M. Henry
// @version 5.0
String result = "";
try
{
   Double temp = OurMath.squareRoot(value);
   result = temp.toString();
}

catch (SquareRootException e)
{  // Assertion: value is negative
   Double temp = OurMath.squareRoot(−value);
   result = temp.toString() + "i";
}