J. Cliff Dyer escribió: > Dotan Cohen wrote:
>> FIrst of all, how is the % symbol (as in 70%6=4) called in English? >> >> Second, in Turbo C -111%10=-1 however in python -111%10=9. Is one or >> the other in error? Is this a known gotcha? I tried to google the >> subject however one cannot google the symbol %. Thanks in advance. >> >> Dotan Cohen >> > > The % operator is called "modulo" in English. I don't think the > difference in implementation is an error. It's just a difference of > calculation method. > > Python will always yield a number x = m%n such that 0 <= x < n, but > Turbo C will always yield a number such that if x = m%n -x = -m%n. That > is, since 111 % 10 = 1, -111 % 10 = -1. The two values will always > differ by n (as used above). In fact, what you get in C depends on the compiler and architecture, while Python is always consistent and returns positive remainders. More info: http://www.python.org/doc/faq/programming/#why-does-22-10-return-3 http://groups.google.com/group/comp.lang.python/search?group=comp.lang.python&q=modulo+negative+C -- http://mail.python.org/mailman/listinfo/python-list