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From: ludo@gnu.org (Ludovic Courtès)
To: bug-guile@gnu.org
Subject: Re: big number printout
Date: Wed, 02 Jul 2008 09:30:06 +0200	[thread overview]
Message-ID: <87myl0216p.fsf@gnu.org> (raw)
In-Reply-To: 20080701140151.M11358@ccrma.Stanford.EDU

Hi,

"Bill Schottstaedt" <bil@ccrma.Stanford.EDU> writes:

> Not sure this is a bug, but it is confusing:
>
> guile> (version)
> "1.8.5"
> guile> (+ 40816513889983671.0 3.0)
> 40816513889983700.0

You're exceeding the precision of a float or double (whichever is used
for reals):

  guile> 40816513889983671.0
  40816513889983700.0  <--- rounded up
  guile> 40816513889983671
  40816513889983671    <--- integers are not rounded

FWIW, Bigloo and Ikarus behave similarly, and I don't think there's much
that can be done.

Thanks,
Ludovic.





  reply	other threads:[~2008-07-02  7:30 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-07-01 14:03 big number printout Bill Schottstaedt
2008-07-02  7:30 ` Ludovic Courtès [this message]
2008-07-02 21:22   ` Marijn Schouten (hkBst)
2008-07-03  7:17     ` Ludovic Courtès
  -- strict thread matches above, loose matches on Subject: below --
2008-07-02 22:36 Bill Schottstaedt
2008-07-03 21:58 ` Neil Jerram
2008-07-04  0:53   ` Bill Schottstaedt
2008-07-04  8:31     ` Neil Jerram
2008-07-04  9:18       ` Marijn Schouten (hkBst)

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