rational, real, number, t

The canonical representation of a rational is as an integer if its value is integral, and otherwise as a ratio.

The types integer and ratio are disjoint subtypes of rational.

Abbreviating.

• rational [lower-limit [upper-limit]]

• lower-limit, upper-limit - interval designators for type rational. The defaults for each of lower-limit and upper-limit is the symbol *.

This denotes the rationals on the interval described by lower-limit and upper-limit.

\issue{REAL-NUMBER-TYPE:X3J13-MAR-89}