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Groups > comp.lang.python > #79461

Re: (-1)**1000

From Terry Reedy <tjreedy@udel.edu>
Subject Re: (-1)**1000
Date 2014-10-22 13:15 -0400
References <54476a77$0$21664$426a74cc@news.free.fr>
Newsgroups comp.lang.python
Message-ID <mailman.15086.1413998140.18130.python-list@python.org> (permalink)

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On 10/22/2014 4:27 AM, ast wrote:
> Hello
>
> If i am writing (-1)**1000 on a python program, will the
> interpreter do (-1)*(-1)*...*(-1) or something clever ?

The answer depends on the implementation.

> In fact i have (-1)**N with N an integer potentially big.
>
> I do some tests that suggest that Python is clever

You probably mean "CPython is clever".  Other implementations may or may 
not have the same optimizations.



-- 
Terry Jan Reedy

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Thread

(-1)**1000 "ast" <nomail@invalid.com> - 2014-10-22 10:27 +0200
  Re: (-1)**1000 Chris Angelico <rosuav@gmail.com> - 2014-10-22 19:54 +1100
    Re: (-1)**1000 "ast" <nomail@invalid.com> - 2014-10-22 11:27 +0200
      Re: (-1)**1000 Peter Otten <__peter__@web.de> - 2014-10-22 12:29 +0200
      Re: (-1)**1000 Michiel Overtoom <motoom@xs4all.nl> - 2014-10-22 12:38 +0200
      Re: (-1)**1000 Tim Chase <python.list@tim.thechases.com> - 2014-10-22 05:43 -0500
      Re: (-1)**1000 Peter Otten <__peter__@web.de> - 2014-10-22 13:02 +0200
      Re: (-1)**1000 Ian Kelly <ian.g.kelly@gmail.com> - 2014-10-22 08:23 -0600
      Re: (-1)**1000 Ian Kelly <ian.g.kelly@gmail.com> - 2014-10-22 08:29 -0600
      Re: (-1)**1000 Ned Batchelder <ned@nedbatchelder.com> - 2014-10-22 11:01 -0400
    Re: (-1)**1000 wxjmfauth@gmail.com - 2014-10-22 04:35 -0700
  Re: (-1)**1000 Peter Otten <__peter__@web.de> - 2014-10-22 11:13 +0200
  Re: (-1)**1000 Terry Reedy <tjreedy@udel.edu> - 2014-10-22 13:15 -0400
  Re: (-1)**1000 Dave Angel <davea@davea.name> - 2014-10-24 13:57 -0400
  Re: (-1)**1000 Tony the Tiger <tony@tiger.invalid> - 2014-10-26 20:07 +0000
    Re: (-1)**1000 Ned Batchelder <ned@nedbatchelder.com> - 2014-10-26 16:45 -0400
    Re: (-1)**1000 Stefan Behnel <stefan_ml@behnel.de> - 2014-10-29 20:31 +0100

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