NaN

[John Stark]

In Enthuware I encountered some questions about NaNs, like:

Which of the following statements about NaNs are true?

Float.NaN == Float.NaN
Float.NaN == Double.NaN
Float.NaN >= 0
Float.NaN < 0
None of the above

I can't remember reading anything about NaNs in the K & B book. Are NaNs part of the exam?

Thanks,

John

[Stephan van Hulst]

I'm not sure, but NaN comparisons are pretty simply: everything returns false. I believe NaN doesn't even equal itself.

[John Stark]

Yes, you are right Float.NaN == Float.NaN gives false. That makes it pretty easy then, thanks.

John