null? -- r7rs Definition

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Kind

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type-predicate;

Extended by

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• null? (from vonuvoli);

Procedure signature

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Procedure variants:

• ((null) -> (true))
  • input: a value of type null;
  • output: a value of type true;
• ((pair) -> (false))
  • input: a value of type pair;
  • output: a value of type false;
• ((any) -> (false))
  • input: a value of type any;
  • 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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(null? obj)

Returns #t if obj is the empty list, otherwise returns #f.

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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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• null;
• true;
• pair;
• false;
• any;