symbol? -- r7rs Definition

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Kind

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type-predicate;

Extended by

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• symbol? (from vonuvoli);

Procedure signature

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Procedure variants:

• ((symbol) -> (true))
  • input: a value of type symbol;
  • output: a value of type true;
• ((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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(symbol? obj)

Returns #t if obj is a symbol, otherwise returns #f.

(symbol? 'foo)          ===>  #t
(symbol? (car '(a b)))  ===>  #t
(symbol? "bar")         ===>  #f
(symbol? 'nil)          ===>  #t
(symbol? '())           ===>  #f
(symbol? #f)            ===>  #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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• symbol;
• true;
• any;
• false;