In the Errata there is a posting for pages 76 & 77 Error in Code that states, "Last line should be MessageBox.Show(dblArea.ToString, "Area").

dblArea is declared as Double. Why is it necessary to convert it to a string? The program runs with, or without, the addition of "ToString".

Is there ever a time when one would want to convert a Double to a String? If so, when?

Thanks.

In Visual Basic 2005 it is not necessary to convert the value contained in dblArea to a string to display it in a message box unless you have Option Strict turned on. The Show method of the MessageBox class expects a string value to display thus we have included the ToString method to convert the double value to a string.

I hope this clears this up for you.

Thearon