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.
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