Groups > comp.lang.python > #20185

Re: round down to nearest number

From	Olive <diolu@bigfoot.com>
Newsgroups	comp.lang.python
Subject	Re: round down to nearest number
Date	2012-02-10 21:56 +0100
Organization	Aioe.org NNTP Server
Message-ID	<20120210215644.6d865482@bigfoot.com> (permalink)
References	<460b3d7b-d2ce-492a-ab61-ea4a1ee58198@1g2000yqv.googlegroups.com> <mailman.5623.1328834861.27778.python-list@python.org> <d7e99230-5687-4407-b998-a59cffe9833a@i18g2000yqf.googlegroups.com> <mailman.5628.1328838241.27778.python-list@python.org>

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On Thu, 9 Feb 2012 17:43:58 -0800
Chris Rebert <clp2@rebertia.com> wrote:

> On Thu, Feb 9, 2012 at 5:23 PM, noydb <jenn.duerr@gmail.com> wrote:
> > hmmm, okay.
> >
> > So how would you round UP always?  Say the number is 3219, so you
> > want 3300 returned.
> 
> http://stackoverflow.com/questions/17944/how-to-round-up-the-result-of-integer-division/96921
> 
> Thus: (3219 + 99) // 100
> 
> Slight tangent: Beware negative numbers when using // or %.

This trick work always (even if the entry is a float):


-(-a//100)*100

>>> -(-3219//100)*100
3300

>>> -(-3200.1//100)*100

3300.0

Thread

round down to nearest number noydb <jenn.duerr@gmail.com> - 2012-02-09 16:30 -0800
  Re: round down to nearest number Ian Kelly <ian.g.kelly@gmail.com> - 2012-02-09 17:47 -0700
    Re: round down to nearest number noydb <jenn.duerr@gmail.com> - 2012-02-09 17:23 -0800
      Re: round down to nearest number Chris Rebert <clp2@rebertia.com> - 2012-02-09 17:43 -0800
        Re: round down to nearest number Olive <diolu@bigfoot.com> - 2012-02-10 21:56 +0100
      Re: round down to nearest number Ian Kelly <ian.g.kelly@gmail.com> - 2012-02-09 19:00 -0700
        Re: round down to nearest number noydb <jenn.duerr@gmail.com> - 2012-02-09 18:25 -0800
          Re: round down to nearest number MRAB <python@mrabarnett.plus.com> - 2012-02-10 03:36 +0000
          Re: round down to nearest number Ian Kelly <ian.g.kelly@gmail.com> - 2012-02-09 23:21 -0700
          Re: round down to nearest number Arnaud Delobelle <arnodel@gmail.com> - 2012-02-10 09:58 +0000
            Re: round down to nearest number noydb <jenn.duerr@gmail.com> - 2012-02-10 09:23 -0800
          Re: round down to nearest number Alec Taylor <alec.taylor6@gmail.com> - 2012-02-10 22:05 +1100
      Re: round down to nearest number Terry Reedy <tjreedy@udel.edu> - 2012-02-09 22:29 -0500
        Re: round down to nearest number Hrvoje Niksic <hniksic@xemacs.org> - 2012-02-11 11:26 +0100
      Re: round down to nearest number MRAB <python@mrabarnett.plus.com> - 2012-02-10 03:39 +0000

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