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22.800000 and a 1 on the end!!??

>>x = 5
>>x /= 2
x
2
>>x *=11.4
x
22.800000000000 001

ok where does the 1 in the come from?
Jun 27 '08 #1
3 870
On May 25, 8:58*pm, notnorweg...@ya hoo.se wrote:
>x = 5
x /= 2
x
2
>x *=11.4
x

22.800000000000 001

ok where does the 1 in the come from?
Floating point arithmetic.

Michael Foord
http://www.ironpythoninaction.com/
Jun 27 '08 #2
no**********@ya hoo.se schrieb:
ok where does the 1 in the come from?
Conversion to floating point values, which have no precise
representation for all numbers that have such in the decimal system.
Read more on http://en.wikipedia.org/wiki/IEEE_754-1985

Regards,
Johannes

--
"Wer etwas kritisiert muss es noch lange nicht selber besser können. Es
reicht zu wissen, daß andere es besser können und andere es auch
besser machen um einen Vergleich zu bringen." - Wolfgang Gerber
in de.sci.electron ics <47************ ***********@new s.freenet.de>
Jun 27 '08 #3
ok where does the 1 in the come from?

http://www.python.org/doc/faq/genera...-so-inaccurate

Regards,
Martin
Jun 27 '08 #4

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