real
,
number
,
t
The type real
includes all numbers that
represent mathematical real numbers, though there are mathematical real
numbers (e.g., irrational numbers) that do not have an exact representation
in Common Lisp. Only reals can be ordered using the
<
, >
, <=
, and >=
functions.
The types rational
and float
are disjoint
subtypes of type real
.
Abbreviating.
(real [lower-limit [upper-limit]])
lower-limit, upper-limit—interval designators
for type real
.
The defaults for each of lower-limit and upper-limit is the symbol *
.
This denotes the reals on the interval described by lower-limit and upper-limit.