rational (System Class) (ANSI and GNU Common Lisp Document)

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#### 12.2.6 rational [System Class]

#### Class Precedence List::

rational,

real,

number, t

#### Description::

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 type rational.

#### Compound Type Specifier Kind::

Abbreviating.

#### Compound Type Specifier Syntax::

(`rational`{`[`lower-limit [upper-limit]`]`})

#### Compound Type Specifier Arguments::

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

#### Compound Type Specifier Description::

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