The -
message is a binary message. Accordingly, if you wish to
calculate the negative of a number, you must use the unary
negated
method:
5 negated <-- Negate 5, answer -5
Similarly, the /
message is a binary message. If you wish to
calculate the reciprocal of a number, you must use the unary
reciprocal
method:
5 reciprocal <-- Reciprocate 5, answer (1/5)