numberp (Function)

Syntax:

Arguments and Values:

object—an object.

generalized-boolean—a generalized boolean.

Description:

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

Examples:

 (numberp 12) → true
 (numberp (expt 2 130)) → true
 (numberp #c(5/3 7.2)) → true
 (numberp nil) → false
 (numberp (cons 1 2)) → false

Notes:

 (numberp object) ≡ (typep object 'number)