cond gives error if test clause omitted

[technoblogy]

Example:

(defun test (n)
  (cond
   ((oddp n) n)
   ((list n))))

(test 2) gives an error. Workaround: include a t for the final clause:

(defun test (n)
  (cond
   ((oddp n) n)
   (t (list n))))