You can work with Boolean values using the usual and, or, xor, and not operations.
Often you need to use parentheses around the conditions to make it clear for the compiler, for example, if (4 < 5) and (6 < 7) [print "ok"] ;== ok.
However, complement is like not for Boolean, but it gives a bitwise opposite value for other types.
⇒ Now answer question 6 from the Questions section.
How do you compare two values? For example, n: 13 and m: 42:
- Use = (or equal? as an infix operator) to see if the values are the same (just like in mathematics!):
;-- see Chapter03/evaluation.red: n = m ;== false 13 = 13.0 ;== true equal? 13 13.0 ;== true "red" = "Red" ;== true
- Use <> (or not-equal?) to see if the values are different: ...
