guido at python
Feb 28, 2007, 1:44 PM
Post #4 of 4
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Re: Integer division operator can give float result?
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Also consider this example:
>>> 7.2 // 0.5
14.0
>>>
On 2/28/07, Facundo Batista <facundo[at]taniquetil.com.ar> wrote:
> Greg Ewing wrote:
>
> > Is this intentional? I would have expected the
> > // operator to always give an integer result.
> >
> > Python 2.3 (#1, Aug 5 2003, 15:52:30)
> > [GCC 3.1 20020420 (prerelease)] on darwin
> > Type "help", "copyright", "credits" or "license" for more information.
> > >>> 7.0 // 2
> > 3.0
>
> >From the Language Reference:
>
> The / (division) and // (floor division) operators yield the quotient
> of their arguments. The numeric arguments are first converted to a
> common type. Plain or long integer division yields an integer of the
> same type; the result is that of mathematical division with the
> `floor' function applied to the result.
>
> So, first the arguments are converted to a common type, in this case
> float. Then the division is made. Then the 'floor' function is applied.
> Result: 3.0.
>
> So yes, it's intentional.
>
> Regards,
>
> --
> . Facundo
> .
> Blog: http://www.taniquetil.com.ar/plog/
> PyAr: http://www.python.org/ar/
>
>
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--
--Guido van Rossum (home page: http://www.python.org/~guido/)
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