rationalp
object ⇒ generalized-boolean
object—an object.
generalized-boolean—a generalized boolean.
Returns true if object is of type rational; otherwise, returns false.
(rationalp 12) ⇒ true (rationalp 6/5) ⇒ true (rationalp 1.212) ⇒ false
rational, rationalize [Function]
(rationalp object) ≡ (typep object 'rational)