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Boolean values: Difference between revisions
Added PicoLisp
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Everything else is true. The keyword <tt>TRUE</tt> exists.
[http://www.php.net/manual/en/language.types.boolean.php#language.types.boolean.casting]
=={{header|PicoLisp}}==
Like in all Lisps, the symbol 'NIL' denotes "false", any other value "true".
Some functions return the symbol 'T' for "true" if no other useful (non-NIL)
value is available in the given context. Note that 'NIL' and 'T' are written in
uppercase letters (PicoLisp is case-sensitive).
=={{header|Pike}}==
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