heme added the comment: Hi SilentGhost
Thanx for a quick response. Sorry to hear that it is not a bug, my old GW basic interpretor from 1988 has no problem with this simple calculation (123.56 - 62.12 = 61.44) but my new Python interpreter cannot give me a correct answer. Yes, I know about precision, I have been using C for several years, but as I am interested in the Raspberry Pi I would like to use Python with it. And as I would use it as a data collector (from instruments), I need good precision and reliability. Is there anything I can do? (exept changing to another language) brg Henning SilentGhost skrev den 22/11/2014 21:33: > SilentGhost added the comment: > > Hi Henning, > > this is not a bug. This is to do with how floating point numbers represented > in computers. I'd suggest https://en.wikipedia.org/wiki/IEEE_floating_point > [1] as a starting point. Briefly, due to binary base that the computers > operate on, not every number can be stored/represented precisely. In any case > there are plenty of other information online that you can find useful, the > easiest solution is to output correctly formatted strings corresponding to > your answers. > > Good luck. > > ---------- > nosy: +SilentGhost > resolution: -> not a bug > status: open -> closed > > _______________________________________ > Python tracker <rep...@bugs.python.org> > <http://bugs.python.org/issue22917 [2]> > _______________________________________ Links: ------ [1] https://en.wikipedia.org/wiki/IEEE_floating_point [2] http://bugs.python.org/issue22917 ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue22917> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
