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