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Boolean values: Difference between revisions
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=={{header|Perl}}==
The values in Perl that are false are: <tt>0</tt> (as a number (including 0.0), or as the string <tt>'0'</tt>,
Everything else is true.
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Perl has no special "true" or "false" keywords.
[http://perldoc.perl.org/perlsyn.html#Truth-and-Falsehood]
=={{header|PHP}}==
The values in PHP that are false are: <tt>FALSE</tt>, <tt>NULL</tt>, the number <tt>0</tt> (as an integer <tt>0</tt>, float <tt>0.0</tt>, or string <tt>'0'</tt>, but '''not''' the string <tt>"0.0"</tt>), the empty string <tt>""</tt>, the empty array <tt>array()</tt>, and "SimpleXML objects created from empty tags"(?).
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|Python}}==
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