Specific Data Type Predicates

symbolp object

Function

symbolp returns t if object is of type Symbol and nil otherwise.

consp object

Function

consp returns t if object is of type Cons and nil otherwise.

listp object

Function

listp returns t if object is of type Cons or nil and nil otherwise.

numberp object

Function

numberp returns t if object is of any type whose has a supertype of Number and nil otherwise.

rationalp object

Function

rationalp returns t if object is of any type whose has a supertype of Rational and nil otherwise.

integerp object

Function

integerp returns t if object is of type Integer and nil otherwise.

ratiop object

Function

ratiop returns t if object is of type Ratio and nil otherwise.

stringp object

Function

stringp returns t if object is of type String and nil otherwise.

characterp object

Function

stringp returns t if object is of type Character and nil otherwise.

functionp object

Function

functionp returns t if object is of type Function and nil otherwise.

hashTableP object

Function

hashTableP returns t if object is of type Hashtable and nil otherwise.