zero? -- r7rs Definition

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Kind

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predicate;

Extended by

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• zero? (from vonuvoli);

Procedure signature

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Procedure variants:

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

Exports

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• scheme:base -- (scheme base);

Exports recursive

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• scheme -- (scheme);

Description

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(zero? z)
(positive? x)
(negative? x)
(odd? n)
(even? n)

These numerical predicates test a number for a particular property, returning #t or #f. See note above.

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

Referenced-types

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• number-zero;
• true;
• number;
• false;