Re: Re: #22527 [Opn->Bgs]: Modulus returned negative value

Well, Perl can lean the other way as well actually. Try this: use integer; print -27%7; You will see it gives you -6. Like I said, it comes down to which way you truncate. Programmers tend to think that something like (int)(-3.4) should result in -3. If that is what you expect, then I think you also have to expect -27%7 to return -6. -Rasmus On Tue, 4 Mar 2003, George Schlossnagle wrote: > Interesting. > > I don't know what the ISO standard say, but mathematically a a % b will > always return you an integer 0 <= a%b < b (since there are no negative > numbers in canonical representation of Z/bZ). I guess perl/python/tcl > ddecided to adhere to the mathematical definition. > > > On Tuesday, March 4, 2003, at 02:37 AM, Rasmus Lerdorf wrote: > > > This is actually an interesting question. Should we be truncating > > towards > > zero? I'd say yes, but then I tested Perl, Python and Tcl, and they > > all > > say that -27 % 7 is 1 which means they truncate towards negative > > infinity. > > >