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Date: Fri, 9 Jan 2015 16:25:08 -0800
Message-ID: <CAH+w=7Yq40Ksd-Y49hoBLexS+-o-CQHjtZ34k5zksY+g6W0=cg@mail.gmail.com>
Subject: Re: Math expression evaluation error?
From: Bart Schaefer <schaefer@brasslantern.com>
To: Zsh hackers list <zsh-workers@zsh.org>
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On Fri, Jan 9, 2015 at 3:52 PM, Ray Andrews <rayandrews@eastlink.ca> wrote:
> It seems to me that if the
> shell accepts the fractions then it should return the correct answer.  I'd
> make integer math  the option and have accurate results as the default
> but that's just me.


3/8 is not a fraction.  Yes, in a text paragraph like this one I might
write 3/8 as a fraction because I can't write a superscript three over
a subscript eight, but in an arithmetic expression 0.375 is a fraction
and 3/8 is "integer 3 divided by integer 8", and the definition of
"divided by" includes "if both numerator and denominator are integers,
then the result must also be an integer".  As has been mentioned, this
is the way a LOT of programming languages work.