mirror of
https://github.com/php/doc-ja.git
synced 2026-04-24 00:18:15 +02:00
Yoshinari Takaoka
48c17fb269
Would be nice if we could actually link to these, but this is as good as it goes for now. https://github.com/php/doc-en/commit/72059f653075e1466254f4f2609859993c53f906
93 lines
2.5 KiB
XML
93 lines
2.5 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
|
|
<!-- $Revision$ -->
|
|
<!-- EN-Revision: 72059f653075e1466254f4f2609859993c53f906 Maintainer: hirokawa Status: ready -->
|
|
<!-- CREDITS: takagi -->
|
|
<refentry xml:id="function.sqrt" xmlns="http://docbook.org/ns/docbook">
|
|
<refnamediv>
|
|
<refname>sqrt</refname>
|
|
<refpurpose>平方根</refpurpose>
|
|
</refnamediv>
|
|
<refsect1 role="description">
|
|
&reftitle.description;
|
|
<methodsynopsis>
|
|
<type>float</type><methodname>sqrt</methodname>
|
|
<methodparam><type>float</type><parameter>num</parameter></methodparam>
|
|
</methodsynopsis>
|
|
<para>
|
|
<parameter>num</parameter> の平方根を返します。
|
|
</para>
|
|
</refsect1>
|
|
<refsect1 role="parameters">
|
|
&reftitle.parameters;
|
|
<para>
|
|
<variablelist>
|
|
<varlistentry>
|
|
<term><parameter>num</parameter></term>
|
|
<listitem>
|
|
<para>
|
|
処理する引数。
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
</para>
|
|
</refsect1>
|
|
<refsect1 role="returnvalues">
|
|
&reftitle.returnvalues;
|
|
<para>
|
|
<parameter>num</parameter> の平方根を返します。
|
|
負の数を指定した場合は、特別な値 <literal>NAN</literal> を返します。
|
|
</para>
|
|
</refsect1>
|
|
<refsect1 role="examples">
|
|
&reftitle.examples;
|
|
<para>
|
|
<example>
|
|
<title><function>sqrt</function> の例</title>
|
|
<programlisting role="php">
|
|
<![CDATA[
|
|
<?php
|
|
// 小数点以下の精度は、precision ディレクティブの設定に依存します
|
|
echo sqrt(9); // 3
|
|
echo sqrt(10); // 3.16227766 ...
|
|
?>
|
|
]]>
|
|
</programlisting>
|
|
</example>
|
|
</para>
|
|
</refsect1>
|
|
<refsect1 role="seealso">
|
|
&reftitle.seealso;
|
|
<para>
|
|
<simplelist>
|
|
<member><function>pow</function></member>
|
|
<member><constant>M_SQRTPI</constant> - <code>sqrt(pi)</code></member>
|
|
<member><constant>M_2_SQRTPI</constant> - <code>2/sqrt(pi)</code></member>
|
|
<member><constant>M_SQRT2</constant> - <code>sqrt(2)</code></member>
|
|
<member><constant>M_SQRT3</constant> - <code>sqrt(3)</code></member>
|
|
<member><constant>M_SQRT1_2</constant> - <code>1/sqrt(2)</code></member>
|
|
</simplelist>
|
|
</para>
|
|
</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
|
|
-->
|