zl:1 - FTP

ationalp
428
Examples:
(rationalize B.2) => 1/5
(rationalize 3.95) => 79/28
For a table of related items: See the section "Functions That Convert Noncomplex
to Rational Numbers" in Symbolics Common Lisp: Language Concepts.
I
rationalp object Function
This predicate is true if object is a rational number (a ratio or an integer)
after conversion to canonical form; it is false otherwise.
Examples:
(rationa1p 3.B) => NIL
(rationalp 2) => T
(rationa1p #c(3 4)) => NIL
(rationalp (I 22 7)) => T
(rationa1p #c(4 B)) => T ;comp1ex canonica1ization
For a table of related items: See the section "Numeric Type-checking
Predicates" in Symbolics Common Lisp: Language Concepts.
zl:rationalp object Function
Returns t if object is a ratio. Returns nil if object is an integer or other
type of object.
Examples:
(zl :rationa1p (I 8 7)) => T
(zl :rationalp 9/16) => T
(zl :rationa1p 4) => NIL
(zl :rationalp (I 9 3)) => NIL
(zl :rationalp 16/4) => NIL
For a table of related items: See the section "Numeric Type-checking
Predicates" in Symbolics Common Lisp: Language Concepts.
*read-base*
Variable
The value of *read-base* is a number controlling the radix in which integers
and ratios are read. Valid values are between 2 and 36, inclusive;
the default is 10 (decimal radix).
The value of *read-base* does not affect rational numbers whose radix is
explicitly indicated by a radix specifier, or by a trailing decimal point. See
the section "Radix Specifier Format" in Symbolics Common Lisp: Language
Concepts.