Hrounding error
Aidan
aweraw at gmail.com
Wed Jun 18 02:05:33 EDT 2008
cooperq at gmail.com wrote:
> Hi,
> I am new to python. I was messing around in the interperator checking
> out the floating point handling and I believe I may have found a
> rounding bug:
>
>>>> 234 - 23234.2345
> -23000.234499999999
>
>
> This is not correct by my calculations.
>
> I am using python 2.5.2 in ubuntu 8.04. I am wondering if this is a
> known bug, or if I am just not understanding some feature of python.
> Thanks for the help!
>
> -Cooper Quintin
> http://www.bitsamurai.net
If you need to round before you display the result, I find the following
works:
>>> '%.4f' % (234 - 23234.2345)
'-23000.2345'
The %.4f means that the interpolated value will be treated as a float,
rounded to 4 digits after the decimal point.
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