cond

The cond macro expands a sequence of tests into nested if forms.

(cond ((= a 12)
       (setq b 23))
      ((> a 45)
       (setq b 99))
      ((< b a)
       (setq a b))
      (t
       (setq a 0)
       (setq b 0)))

The tests can be totally unrelated to each other, as shown above.

Note

While cond can be used as an expression (because it expands into if), this needs care: each arm would need to return a value in a single expression in order to be accepted.