macro
boot.janet on line 180, column 1
(cond & pairs)
Evaluates conditions sequentially until the first true condition is
found, and then executes the corresponding body. If there are an odd
number of forms, and no forms are matched, the last expression is
executed. If there are no matches, return nil.
(defn test
[x]
(cond
(> x 10) "Pretty big!"
(< x 5) "Quite small"
"Medium size"))
(test 40) # => "Pretty big!"
(test 2) # => "Quite small"
(test 6) # => "Medium size"