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abs.xml
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54 lines (53 loc) · 1.58 KB
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<?xml version="1.0" encoding="UTF-8"?>
<!-- EN-Revision: n/a Maintainer: cortesi Status: ready -->
<refentry xml:id="function.abs" xmlns="http://docbook.org/ns/docbook">
<refnamediv>
<refname>abs</refname>
<refpurpose>Valore assoluto</refpurpose>
</refnamediv>
<refsect1>
<title>Descrizione</title>
<methodsynopsis>
<type>number</type><methodname>abs</methodname>
<methodparam><type>mixed</type><parameter>numero</parameter></methodparam>
</methodsynopsis>
<para>
Restituisce il valore assoluto di un numero. Se l'argomento della funzione
è di tipo <type>float</type>, il valore restituito è <type>float</type>,
altrimenti restituisce un <type>integer</type> (perché <type>float</type> di solito ha un range di
valori più grande di <type>integer</type>).
</para>
<example>
<title>Esempio di <function>abs</function></title>
<programlisting role="php">
<![CDATA[
<?php
$abs = abs(-4.2); // $abs = 4.2; (double/float)
$abs2 = abs(5); // $abs2 = 5; (integer)
$abs3 = abs(-5); // $abs3 = 5; (integer)
?>
]]>
</programlisting>
</example>
</refsect1>
</refentry>
<!-- Keep this comment at the end of the file
Local variables:
mode: sgml
sgml-omittag:t
sgml-shorttag:t
sgml-minimize-attributes:nil
sgml-always-quote-attributes:t
sgml-indent-step:1
sgml-indent-data:t
indent-tabs-mode:nil
sgml-parent-document:nil
sgml-default-dtd-file:"~/.phpdoc/manual.ced"
sgml-exposed-tags:nil
sgml-local-catalogs:nil
sgml-local-ecat-files:nil
End:
vim600: syn=xml fen fdm=syntax fdl=2 si
vim: et tw=78 syn=sgml
vi: ts=1 sw=1
-->