#### 12.2.55 rationalp [Function] ¶

`rationalp` object ⇒ generalized-boolean

#### Arguments and Values:: ¶

object—an object.

generalized-boolean—a generalized boolean.

#### Description:: ¶

Returns true if object is of type rational; otherwise, returns false.

#### Examples:: ¶

     (rationalp 12) ⇒  true
     (rationalp 6/5) ⇒  true
     (rationalp 1.212) ⇒  false

#### See Also:: ¶

rational, rationalize [Function]

#### Notes:: ¶

     (rationalp object) ≡ (typep object 'rational)