<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.4 $ -->
<!-- splitted from ./en/functions/gmp.xml, last change in rev 1.1 -->
  <refentry id="function.gmp-sign">
   <refnamediv>
    <refname>gmp_sign</refname>
    <refpurpose>Sign of number</refpurpose>
   </refnamediv>
   <refsect1>
    <title>Description</title>
     <methodsynopsis>
      <type>int</type><methodname>gmp_sign</methodname>
     <methodparam><type>resource</type><parameter>a</parameter></methodparam>
     </methodsynopsis>
    <para>
     Returns 1 if <parameter>a</parameter> is positive,
     -1 if <parameter>a</parameter> is negative,
     and 0 if <parameter>a</parameter> is zero.
    </para>
    <example>
     <title><function>gmp_sign</function> example</title>
     <programlisting role="php">
<![CDATA[
<?php
// positive
echo gmp_sign("500") . "\n";

// negative
echo gmp_sign("-500") . "\n";

// zero
echo gmp_sign("0") . "\n";
?>
]]>
     </programlisting>
     <para>
      The printout of the above program will be:
     </para>
     <screen>
<![CDATA[
1
-1
0
]]>
     </screen>
    </example>
   </refsect1>
  </refentry>

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