numberp

numberp Function

Syntax:

numberp object → generalized-boolean

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)

Expanded Reference: numberp

tip

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(numberp )