AppletTalk.com Java discussions newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  NaN in the JVM          AppletTalk.com Forum Index -> JVM, native methods and hardware View previous topic :: View next topic   Author Message Henry Guest Posted: Thu May 20, 2004 2:13 pm    Post subject: NaN in the JVM Hi, I want to know what is the semantic of the value NaN (when using float). Is this a special value only for errors ? Or can there be cases where NaN is set by the JVM in valid operations ? My understanding of NaN is that it is used each time you divide by zero. Thanks in advance, Henry Back to top Jonas Geiregat Guest Posted: Tue Jun 15, 2004 1:55 pm    Post subject: Re: NaN in the JVM Henry wrote: Quote: Hi, I want to know what is the semantic of the value NaN (when using float). Is this a special value only for errors ? Or can there be cases where NaN is set by the JVM in valid operations ? My understanding of NaN is that it is used each time you divide by zero. Thanks in advance, Henry Doesn't NaN stand for Not a Number ? Back to top Chris Smith Guest Posted: Tue Jun 15, 2004 2:07 pm    Post subject: Re: NaN in the JVM Jonas Geiregat wrote: Quote: Doesn't NaN stand for Not a Number ? Yes, it does. -- www.designacourse.com The Easiest Way to Train Anyone... Anywhere. Chris Smith - Lead Software Developer/Technical Trainer MindIQ Corporation Back to top Andrew Thompson Guest Posted: Tue Jun 15, 2004 2:16 pm    Post subject: Re: NaN in the JVM On Tue, 15 Jun 2004 15:55:59 +0200, Jonas Geiregat wrote: Quote: Henry wrote: ... My understanding of NaN is that it is used each time you divide by zero. ... Doesn't NaN stand for Not a Number ? It does, try this.. System.out.println( Math.sqrt( -1 ) ); Attempts to divide by zero will also result in a mathematical entity that is not representable in the normal numeric range. (..err I forget the term for such a number) -- Andrew Thompson http://www.PhySci.org/ Open-source software suite http://www.PhySci.org/codes/ Web & IT Help http://www.1point1C.org/ Science & Technology Back to top Mark Bottomley Guest Posted: Wed Jun 16, 2004 12:19 am    Post subject: Re: NaN in the JVM "Andrew Thompson" <SeeMySites (AT) www (DOT) invalid> wrote Quote: On Tue, 15 Jun 2004 15:55:59 +0200, Jonas Geiregat wrote: Henry wrote: .. My understanding of NaN is that it is used each time you divide by zero. .. Doesn't NaN stand for Not a Number ? It does, try this.. System.out.println( Math.sqrt( -1 ) ); Attempts to divide by zero will also result in a mathematical entity that is not representable in the normal numeric range. (..err I forget the term for such a number) -- Andrew Thompson http://www.PhySci.org/ Open-source software suite http://www.PhySci.org/codes/ Web & IT Help http://www.1point1C.org/ Science & Technology One of the best sites for understanding floating point numbers is http://babbage.cs.qc.edu/courses/cs341/IEEE-754references.html It identifies Quiet and Signalling Nan's. There are also +/- infinities, +/- zeroes, denormalized floating point numbers and signed underflows. The links off the page go to on-line hex/float43/float64 conversions. You can also find many of the rules for Nan's and infinities in the JVM spec. Mark... Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First         AppletTalk.com Forum Index -> JVM, native methods and hardware All times are GMT Page 1 of 1   Jump to: Select a forum Java Newsgroups----------------Java DiscussionsWeb-based java games comp.lang.java 3D Graphics API's for Java Java: Support and criticism Java System Announcements comp.lang.java.api JavaBeans Java and CORBA Java and Databases comp.lang.java.developer Java GUI Toolkits Java Help comp.lang.java.javascript JVM, native methods and hardware comp.lang.java.misc Java Language Programming Security and Java comp.lang.java.setup Java Software Tools comp.lang.java.tech ibm.software.java.linux  Non-English Java Newsgroups----------------Java Language (German)Language Java (Français)Java (Italian)  You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum Powered by phpBB © 2001, 2006 phpBB Group SEO toolkit © 2004-2006 webmedic.