From: Bart Schaefer <schaefer@brasslantern.com>
To: Emanuel Berg <embe8573@student.uu.se>, zsh-workers@zsh.org
Subject: Re: why do ceil/floor give the decimal dot?
Date: Wed, 13 May 2015 19:56:17 -0700 [thread overview]
Message-ID: <150513195617.ZM29493@torch.brasslantern.com> (raw)
In-Reply-To: <87oalodmns.fsf@debian.uxu>
On May 14, 2:32am, Emanuel Berg wrote:
} Subject: why do ceil/floor give the decimal dot?
}
} >From #zsh (incal == yours truly):
}
} <incal> why do ceil/floor give the decimal dot?
} echo $(( floor(5) )) -> 5. Isn't that the
} whole "point" that you want an integer? I know
} I can get it with int but I thought I'd learn
} if there is a reason
}
} <danielsh> incal, I suspect that's an oversight.
} <danielsh> incal, it just uses the C floor() function,
It's not an oversight. The doc says:
Most functions take floating point arguments and return a floating point
value. However, any necessary conversions from or to integer type will
be performed automatically by the shell. Apart from atan with a second
argument and the abs, int and float functions, all functions behave as
noted in the manual page for the corresponding C function [...]
So ciel and floor return float precisely and intentionally because the
C functions do so.
next prev parent reply other threads:[~2015-05-14 2:56 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-14 0:32 Emanuel Berg
2015-05-14 2:56 ` Bart Schaefer [this message]
2015-05-14 3:29 ` Emanuel Berg
2015-05-14 3:53 ` Lawrence Velázquez
2015-05-14 9:53 ` Peter Stephenson
2015-05-14 21:38 ` Emanuel Berg
2015-05-14 22:14 ` Lawrence Velázquez
2015-05-14 23:29 ` Emanuel Berg
2015-05-15 0:46 ` Oliver Kiddle
2015-05-15 1:07 ` Emanuel Berg
2015-05-15 1:27 ` Bart Schaefer
2015-05-18 8:16 ` Vincent Lefevre
2015-05-14 4:04 ` Bart Schaefer
2015-05-14 9:12 ` Emanuel Berg
2015-05-14 17:54 ` Bart Schaefer
2015-05-18 8:39 ` Vincent Lefevre
2015-05-18 9:41 ` Mikael Magnusson
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