exact? -- r7rs Definition

§

Kind

§

type-predicate;

Extended by

§

• exact? (from vonuvoli);

Procedure signature

§

Procedure variants:

• ((exact-number) -> (true))
  • input: a value of type exact-number;
  • output: a value of type true;
• ((inexact-number) -> (false))
  • input: a value of type inexact-number;
  • output: a value of type false;
• ((number) -> (false))
  • input: a value of type number;
  • output: a value of type false;

Exports

§

• scheme:base -- (scheme base);

Exports recursive

§

• scheme -- (scheme);

Description

§

(exact? z)
(inexact? z)

These numerical predicates provide tests for the exactness of a quantity. For any Scheme number, precisely one of these predicates is true.

(exact? 3.0)           ===>  #f
(exact? #e3.0)         ===>  #t
(inexact? 3.)          ===>  #t

---

The text herein was sourced and adapted as described in the "R7RS attribution of various text snippets" appendix.

Referenced-types

§

• exact-number;
• true;
• inexact-number;
• false;
• number;