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From: Henrique <henriquemagalhaes@gmail.com>
Subject: Re: Float conversion
Date: Thu, 29 Jul 2010 11:21:52 -0700 (PDT)
Date: 2010-07-29T11:21:52-07:00	[thread overview]
Message-ID: <cb7a898b-fe3b-424e-adfa-9dcc22ea570c@l20g2000yqm.googlegroups.com> (raw)
In-Reply-To: 1d1txn4x3r5xn.1trm4gx9n87gm$.dlg@40tude.net

On Jul 29, 12:35 pm, "Dmitry A. Kazakov" <mail...@dmitry-kazakov.de>
wrote:
> ------------------------
> var1 9.99900024414063E+02
> var4 9.99900085449219E+02
>
> When rounded to 6 decimal digits both are same. But the underlying base
> binary type is longer than 6 digits.
>
> P.S. It is always useful to think of floating point numbers as intervals
> (which they are) rather than numbers.
>
> --
> Regards,
> Dmitry A. Kazakovhttp://www.dmitry-kazakov.de

As I declared the type with 6 digits, I expected that it would make
the comparison only for these digits (this would gave var4 = var1).

Do I always need to manually truncate the float number to the number
of desired digits before making a comparison of them?? So what is the
advantage of declaring it as "digits 6"?

Thanks



  reply	other threads:[~2010-07-29 18:21 UTC|newest]

Thread overview: 35+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-07-29 12:23 Float conversion Henrique
2010-07-29 12:44 ` Jacob Sparre Andersen
2010-07-29 12:46 ` Dmitry A. Kazakov
2010-07-29 15:08   ` Georg Bauhaus
2010-07-29 15:10     ` Georg Bauhaus
2010-07-29 15:35     ` Dmitry A. Kazakov
2010-07-29 18:21       ` Henrique [this message]
2010-07-29 19:08         ` Jeffrey R. Carter
2010-07-29 19:15         ` Dmitry A. Kazakov
2010-07-30  1:30           ` Phil Clayton
2010-07-30  8:43             ` Dmitry A. Kazakov
2010-07-30 13:14               ` Phil Clayton
2010-07-30 14:34                 ` Dmitry A. Kazakov
2010-07-31 15:12                 ` Stephen Leake
2010-08-03  1:07                   ` Phil Clayton
2010-08-03  3:31                     ` Shark8
2010-08-03 10:38                     ` Georg Bauhaus
2010-08-04  7:27                       ` Stephen Leake
2010-08-04 16:15                         ` Georg Bauhaus
2010-08-04 16:32                       ` Phil Clayton
2010-08-04  7:26                     ` Stephen Leake
2010-08-04 12:52                       ` Robert A Duff
2010-08-04 14:32                         ` Dmitry A. Kazakov
2010-08-04 19:36                           ` Simon Wright
2010-08-04 19:46                             ` Dmitry A. Kazakov
2010-08-04 20:29                             ` Georg Bauhaus
2010-08-05 12:05                         ` Stephen Leake
2010-08-07  5:54                           ` Shark8
2010-08-07  8:56                             ` Georg Bauhaus
2010-08-07 13:49                               ` Shark8
2010-08-05 10:20                       ` Phil Clayton
2010-07-30 13:16           ` Henrique
2010-07-29 15:37   ` Warren
2010-07-29 14:56 ` Georg Bauhaus
2010-07-29 17:56   ` Jeffrey R. Carter
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