Charles Wohlganger added the comment: Modulo is defined mathematically as the remainder of Euclidian division. I.E. a positive r where a % b = r is equivalent to a = b * x + r. I think it confuses the issue to say "-190 % 12 were the mathematical equivalent -10", when that is technically incorrect.
Computer modulo uses truncated division, which is why -a % b != a % -b. "... compilers that truncate i // j need to make i % j have the same sign as i." i % j has the same sign as j, not i. I believe that is the typo that has caused the confusion. I would replace the last line with : "-190 % 12 == -10 is wrong according to the C definition for computer modulo arithmetic." ---------- nosy: +wohlganger _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue31021> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
