From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 11584 invoked from network); 25 Aug 2002 18:07:52 -0000 Received: from sunsite.dk (130.225.247.90) by ns1.primenet.com.au with SMTP; 25 Aug 2002 18:07:52 -0000 Received: (qmail 15440 invoked by alias); 25 Aug 2002 18:07:39 -0000 Mailing-List: contact zsh-users-help@sunsite.dk; run by ezmlm Precedence: bulk X-No-Archive: yes X-Seq: 5290 Received: (qmail 15429 invoked from network); 25 Aug 2002 18:07:39 -0000 X-Amavix: Anti-spam check done by SpamAssassin X-Amavix: Anti-virus check done by McAfee X-Amavix: Scanned by Amavix X-Authentication-Warning: greux.loria.fr: lefevre set sender to vincent@vinc17.org using -f Date: Sun, 25 Aug 2002 20:07:08 +0200 From: Vincent Lefevre To: David =?iso-8859-1?Q?K=E5gedal?= Cc: Patrick Aussems , zsh-users@sunsite.auc.dk Subject: Re: Floating point calculus error... Message-ID: <20020825180708.GE6783@greux.loria.fr> References: <1030288941.517.8.camel@Amok> <20020825155349.GD6783@greux.loria.fr> <87k7me2921.fsf@bix.grotte> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <87k7me2921.fsf@bix.grotte> X-Mailer-Info: http://www.vinc17.org/mutt/ User-Agent: Mutt/1.5.1-current-20020801i On Sun, Aug 25, 2002 at 18:32:38 +0200, David Kågedal wrote: > Vincent Lefevre writes: > > $ echo $[0.4] > > 0.40000000000000002 > > > > I think that it should give the minimum number of decimals in such a way > > that when converting back to binary, one should get the same result. > > But it does. No, this is not the *minimum* number of decimal digits. 0.4 would be sufficient in this case. -- Vincent Lefèvre - Web: - 100% validated (X)HTML - Acorn Risc PC, Yellow Pig 17, Championnat International des Jeux Mathématiques et Logiques, TETRHEX, etc. Work: CR INRIA - computer arithmetic / SPACES project at LORIA