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From: f97stdi@dd.chalmers.se (Staffan Dittmer)
Newsgroups: comp.lang.ada
Subject: Re: Catching NaN .. not a number
Date: 5 May 2001 18:28:43 GMT
Organization: Chalmers University of Technology, Sweden
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Date: 2001-05-05T18:28:43+00:00
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In article <slrn9f8fv0.17m.randhol+abuse@kiuk0156.chembio.ntnu.no>,
	randhol+abuse@pvv.org (Preben Randhol) writes:

>When you say calculating factorial, do you use integer?
 
No, long_float. Works up to ~ 170! for me, at least I believe so....


>         For floating-point, GNAT has the `Machine_Overflows'
>         attribute set to `False' and the normal mode of operation is to
>         generate IEEE NaN and infinite values on overflow 
> 

Ok, so since I'm using Gnat and long_floats, I would expect a NaN on
overflow. 
Is NaN a value in itself? Is it possible to do a check like 
if result = NaN then ...  ?

/ Staffan Dittmer