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Learn Red ? Fundamentals of Red
book

Learn Red ? Fundamentals of Red

by Ivo Balbaert
May 2018
Beginner content levelBeginner
252 pages
6h 19m
English
Packt Publishing
Content preview from Learn Red ? Fundamentals of Red

Working with Boolean values

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: ...
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Publisher Resources

ISBN: 9781789130706Supplemental Content