The natural-number? predicate seems to be
unavailable (though there is a remnant of it in the form of
natural-number/c, which is just a contract alias of
exact-nonnegative-integer?). In any case, it surely means
nonnegative integer.
(One might push the envelope here slightly and add
exactness, but this commit does not go that far.)
The natural-number? predicate seems to be unavailable (though there is a remnant of it in the form of
natural-number/c
, which is just a contract alias ofexact-nonnegative-integer?
). In any case, it surely means nonnegative integer.(One might push the envelope here slightly and add exactness, but this commit does not go that far.)