integerp object → generalized-boolean

object — an object.

generalized-boolean — a generalized boolean.

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

(integerp 1) → true 
(integerp (expt 2 130)) → true 
(integerp 6/5) → false 
(integerp nil) → false

(integerp object) ≡ (typep object 'integer)