From: Ray Andrews <rayandrews@eastlink.ca>
To: Zsh Users <zsh-users@zsh.org>
Subject: forcing float arithmetic.
Date: Wed, 24 Mar 2021 10:19:47 -0700 [thread overview]
Message-ID: <f09863a2-0af9-dbff-08b9-6f595cd7e164@eastlink.ca> (raw)
#integer nn=4
typeset -F nn=4
typeset -F aa=
(( aa = ((2 * nn) - 1) / (nn**2) ))
echo $aa
If 'nn' is declared as an integer the above echos zero but if as a float
the answer is correct. But nn will never actually be other than an
integer so I don't like to declare it as a float. Am I not expecting
successful arithmetic even with the integer? I know you can force the
issue with:
(( aa = ((2 * nn) - 1) / (nn**2.0) ))
... but I wonder why that's needed. Why are answers dumbed down like
that? It's clearly a design decision but it seems to me unnatural. If
'aa' was an integer too I understand the result would have to be rounded
down to zero, but since aa is a float, shouldn't all arithmetic
automatically produce floating point results?
next reply other threads:[~2021-03-24 17:20 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-24 17:19 Ray Andrews [this message]
2021-03-24 17:56 ` Bart Schaefer
2021-03-24 21:51 ` Ray Andrews
2021-03-24 21:54 ` Roman Perepelitsa
2021-03-24 21:59 ` Bart Schaefer
2021-03-25 1:12 ` Ray Andrews
2021-03-25 1:36 ` Daniel Shahaf
2021-03-25 1:45 ` Ray Andrews
2021-03-25 2:37 ` Bart Schaefer
2021-03-25 3:22 ` Ray Andrews
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