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)
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