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From: Arthur Miller <arthur.miller@live.com>
To: Eli Zaretskii <eliz@gnu.org>
Cc: help-gnu-emacs@gnu.org
Subject: Re: What is 0.01 here not 0.01 here 0.009999999999999?
Date: Sat, 03 Apr 2021 06:49:42 +0200	[thread overview]
Message-ID: <AM9PR09MB497778F1DCAD6E4F193AC52A96799@AM9PR09MB4977.eurprd09.prod.outlook.com> (raw)
In-Reply-To: <YGdPX/Y2Zg/T6Qtv@protected.localdomain> (Jean Louis's message of "Fri, 2 Apr 2021 20:07:43 +0300")

Jean Louis <bugs@gnu.support> writes:

> * Eli Zaretskii <eliz@gnu.org> [2021-04-02 17:03]:
>> Suggested reading:
>> 
>>   https://www.itu.dk/~sestoft/bachelor/IEEE754_article.pdf
>
> Thank you, I will read. From:
> https://en.wikipedia.org/wiki/Floating-point_arithmetic#Accuracy_problems
>
> It seem that floating point arithmetic is killer at certain
> situations, so I will just make sure not to fiddle with missiles.

So could be integers as well, these were (fortunately) not killers:

https://hownot2code.com/2016/09/02/a-space-error-370-million-for-an-integer-overflow/

https://medium.com/@jollyfish/integer-overflow-underflow-and-floating-point-imprecision-6ba869a99033






  reply	other threads:[~2021-04-03  4:49 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-02 13:42 What is 0.01 here not 0.01 here 0.009999999999999? Jean Louis
2021-04-02 13:56 ` Stefan Monnier
2021-04-02 17:03   ` Jean Louis
2021-04-02 17:41     ` Teemu Likonen
2021-04-02 18:44       ` Jean Louis
2021-04-02 20:46     ` John Yates
2021-04-02 21:19       ` Jean Louis
2021-04-02 22:04         ` John Yates
2021-04-02 23:29           ` Jean Louis
2021-04-03  4:39             ` Arthur Miller
2021-04-03  5:36               ` Jean Louis
2021-04-03  3:56     ` Arthur Miller
2021-04-03  5:19       ` Jean Louis
2021-04-03 13:54         ` Stefan Monnier
2021-04-03 16:26           ` Packages for ELPA, emacs-libpq Jean Louis
2021-04-02 14:02 ` What is 0.01 here not 0.01 here 0.009999999999999? Eli Zaretskii
2021-04-02 17:07   ` Jean Louis
2021-04-03  4:49     ` Arthur Miller [this message]
2021-04-16 20:41 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-04-17 10:53   ` Jean Louis
2021-04-19 10:51   ` Eric S Fraga

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