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Re: operation of 'round' function


From: Francesco Potorti`
Subject: Re: operation of 'round' function
Date: 08 Feb 2002 13:43:27 +0100
User-agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.1.90

"Eli Zaretskii" <address@hidden> writes:

       Rounding a value equidistant between two integers may choose the
       integer closer to zero, or it may prefer an even integer, depending on
       your machine.  For example, \(round 2.5\) can return 3 on some
       systems, but 3 on others.
   
   The Emacs primitive simply calls `rint', which works according to the
   current rounding mode.

Are we sure that this is a good solution?  Generally speaking, an Elisp
program should behave the same on any platform.  This is not exactly
possible for floating point, so maybe you consider this as an instance
of the general floating point problem?



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