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realp
object => generalized-boolean
object—an object.
generalized-boolean—a generalized boolean.
Returns true if object is of type real; otherwise, returns false.
(realp 12) => true (realp #c(5/3 7.2)) => false (realp nil) => false (realp (cons 1 2)) => false
(realp object) == (typep object 'real)