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Re: decimal numbers

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To python-list@python.org
From "Frank Millman" <frank@chagford.com>
Subject Re: decimal numbers
Date Sat, 15 Feb 2014 12:04:17 +0200
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"Luke Geelen" <luke.geelen@gmail.com> wrote in message 
news:ec88852e-1384-4aa5-834b-85135be94ab9@googlegroups.com...
> Op zaterdag 15 februari 2014 10:18:36 UTC+1 schreef Luke Geelen:
> hello,
>
> i have been working on a python resistor calculator to let my class show 
> what you can do with python.
>
> now i have a script that makes the more speekable value of the resistance 
> (res)
>
[...]
>
> i commented it because it doesn't work (yet), when i have a resistance of
>
> 9.9 Giga ohms it says it is 9 giga ohms. it seems to work with natural 
> number, anyway of using decimals insted so that it says : the resistance 
> is 9.9 Giga Ohms instead of 9 ?
>

You don't say which version of python you are using.

If you are using python2, an integer divided by an integer always returns an 
integer -

>>> 10/3
3

It was changed in python3 to return a float -

>>> 10/3
3.3333333333333335

You can reproduce the python3 behaviour in python2 by adding a 'future' 
directive -

>>> from __future__ import division
>>> 10/3
3.3333333333333335

HTH

Frank Millman

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Thread

decimal numbers luke.geelen@gmail.com - 2014-02-15 01:18 -0800
  Re: decimal numbers Luke Geelen <luke.geelen@gmail.com> - 2014-02-15 01:19 -0800
    Re: decimal numbers "Frank Millman" <frank@chagford.com> - 2014-02-15 12:04 +0200
      Re: decimal numbers Luke Geelen <luke.geelen@gmail.com> - 2014-02-15 02:32 -0800
        Re: decimal numbers "Frank Millman" <frank@chagford.com> - 2014-02-15 12:49 +0200
          Re: decimal numbers Luke Geelen <luke.geelen@gmail.com> - 2014-02-15 09:17 -0800
            Re: decimal numbers Ian Kelly <ian.g.kelly@gmail.com> - 2014-02-15 10:23 -0700
              Re: decimal numbers Luke Geelen <luke.geelen@gmail.com> - 2014-02-15 09:42 -0800
                Re: decimal numbers Luke Geelen <luke.geelen@gmail.com> - 2014-02-15 10:57 -0800
                Re: decimal numbers Mark Lawrence <breamoreboy@yahoo.co.uk> - 2014-02-15 19:06 +0000
                Re: decimal numbers Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-02-15 19:43 +0000
                Re: decimal numbers Ian Kelly <ian.g.kelly@gmail.com> - 2014-02-15 14:34 -0700
                Re: decimal numbers Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-02-16 02:30 +0000
                Re: decimal numbers Chris Angelico <rosuav@gmail.com> - 2014-02-16 13:36 +1100
        Re: decimal numbers "Frank Millman" <frank@chagford.com> - 2014-02-15 12:56 +0200
    Re: decimal numbers Chris Angelico <rosuav@gmail.com> - 2014-02-15 21:13 +1100
  Re: decimal numbers Laurent Pointal <laurent.pointal@free.fr> - 2014-02-15 15:52 +0100
  Re: decimal numbers Ian Kelly <ian.g.kelly@gmail.com> - 2014-02-15 10:20 -0700
  Re: decimal numbers wxjmfauth@gmail.com - 2014-02-16 04:19 -0800

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