4 hundred quadrillonth?

Grant Edwards grante at visi.com
Fri May 22 01:09:57 CEST 2009


On 2009-05-21, Christian Heimes <lists at cheimes.de> wrote:
> seanm.py at gmail.com schrieb:
>> The explaination in my introductory Python book is not very
>> satisfying, and I am hoping someone can explain the following to me:
>> 
>>>>> 4 / 5.0
>> 0.80000000000000004
>> 
>> 4 / 5.0 is 0.8. No more, no less. So what's up with that 4 at the end.
>> It bothers me.
>
> Welcome to IEEE 754 floating point land! :)

Floating point is sort of like quantum physics: the closer you
look, the messier it gets.

-- 
Grant




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