On 19/05/2009 9:57 PM, Igor Tandetnik wrote: > "John Machin" <sjmac...@lexicon.net> wrote > in message news:4a129cb4.2090...@lexicon.net >> It's handy for checking how things work e.g. >> >> sqlite> select (-1) % 7; >> -1 >> sqlite> -- it's not a real modulo operator :-( > > What do you feel is wrong with this result? What should a "real" modulo > operator return, in your opinion? Before you answer, note that you very > likely want this equality to hold for all a, b!=0 : > > a = q*b + r > where q = a/b, r = a%b
Sure do. No problem for Python: >>> for a in (1, -1): ... for b in (7, -7): ... q = a / b ... r = a % b ... x = b * q + r ... print a, b, q, r, x ... 1 7 0 1 1 1 -7 -1 -6 1 -1 7 -1 6 -1 -1 -7 0 -1 -1 >>> _______________________________________________ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
