sqrt.xml

<?xml version="1.0" encoding="UTF-8"?>
<!-- splitted from ./it/functions/math.xml, last change in rev 1.1 -->
<!-- last change to 'sqrt' in en/ tree in rev 1.2 -->
<!-- EN-Revision: n/a Maintainer: cortesi Status: ready -->
<!-- OLD-Revision: 1.78/EN.1.2 -->
  <refentry xml:id="function.sqrt" xmlns="http://docbook.org/ns/docbook">
   <refnamediv>
    <refname>sqrt</refname>
    <refpurpose>Radice quadrata</refpurpose>
   </refnamediv>
   <refsect1>
    <title>Descrizione</title>
     <methodsynopsis>
      <type>float</type><methodname>sqrt</methodname>
      <methodparam><type>float</type><parameter>arg</parameter></methodparam>
     </methodsynopsis>
    <para>
     Restituisce la radice quadrata di <parameter>arg</parameter>.
    </para>
    <para>
      <example>
      <title>Esempio di uso di <function>sqrt</function></title>
      <programlisting role="php">
<![CDATA[
<?php
// La precisione dipende dalle impostazioni delle direttive sulla precisione
echo sqrt(9); // 3
echo sqrt(10); // 3.16227766 ...
?>
]]>
      </programlisting>
     </example>
    </para> 
    <para> 
     Vedere anche <function>pow</function>. 
    </para>
   </refsect1>
  </refentry>

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