The following presentation types represent the Common Lisp numeric types of the same name.
number
Summary: The presentation type that represents a general number. It is the supertype of all the number types described here.
complex
Summary: The presentation type that represents a complex number.
rational
Summary: The presentation type that represents either a ratio or an integer between low and high. Options to this type are base and radix, which are the same as for the integer type.
integer
Summary: The presentation type that represents an integer between low and high. Options to this type are base (default 10 ) and radix (default nil ), which correspond to *print-base* and *print-radix* , respectively. It is a subtype of rational .
ratio
Arguments:
&optional
low high.
The presentation type that represents a ratio between low and high. Options to this type are base and radix, which are the same as for the integer type. It is a subtype of rational .
float
Arguments:
&optional
low high.
The presentation type that represents a floating point number between low and high.
Common Lisp Interface Manager 2.0 User's Guide - 3 Mar 2015