%NFACT bug

[David Hayden]

(01-08-2014 06:12 PM)Han Wrote:  If I am not mistaken, is flag 22 is for cases when you truly have infinity (such as division by 0), whereas flag 21 is for overflow. %NFACT does respect flag 21.

Ah! That's it. Thanks so much.

(01-08-2014 06:12 PM)Han Wrote:  Perhaps you are expecting it to return the factorial of any real number, whereas the program is designed to return the factorial of an DOREAL integer.

Yes I think that's fair. A good way to look at it is that %NFACT expects a DOREAL integer argument greater than zero. The fact that it returns something sort-of meaningful for DOREAL integers less than -1 is just coincidence.

Thanks for your help!
Dave