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<refentry xml:id="function.bcmul" xmlns="http://docbook.org/ns/docbook" xmlns:xi="http://www.w3.org/2001/XInclude">

<refnamediv>

<refname>bcmul</refname>

<refpurpose>Multiplica dos números de precisión arbitraria</refpurpose>

</refnamediv>

<refsect1 role="description">

&reftitle.description;

<methodsynopsis>

<type>string</type><methodname>bcmul</methodname>

<methodparam><type>string</type><parameter>num1</parameter></methodparam>

<methodparam><type>string</type><parameter>num2</parameter></methodparam>

<methodparam choice="opt"><type class="union"><type>int</type><type>null</type></type><parameter>scale</parameter><initializer>&null;</initializer></methodparam>

</methodsynopsis>

<simpara>

Multiplica <parameter>num1</parameter> por <parameter>num2</parameter>.

</simpara>

</refsect1>

<refsect1 role="parameters">

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</refsect1>

<refsect1 role="returnvalues">

&reftitle.returnvalues;

<para>

Devuelve el resultado como un string.

</para>

</refsect1>

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<refsect1 role="changelog"><!-- {{{ -->

&reftitle.changelog;

<informaltable>

<tgroup cols="2">

<thead>

<row>

<entry>&Version;</entry>

<entry>&Description;</entry>

</row>

</thead>

<tbody>

<row>

<entry>8.0.0</entry>

<entry>

<parameter>scale</parameter> ahora es nullable.

</entry>

</row>

<row>

<entry>7.3.0</entry>

<entry>

<function>bcmul</function> ahora devuelve números con la escala solicitada.

Anteriormente, los números devueltos podían omitir los ceros decimales finales.

</entry>

</row>

</tbody>

</tgroup>

</informaltable>

</refsect1><!-- }}} -->

<refsect1 role="examples">

&reftitle.examples;

<example>

<title>Ejemplo de <function>bcmul</function></title>

<programlisting role="php">

<![CDATA[

<?php

echo bcmul('1.34747474747', '35', 3); // 47.161

echo bcmul('2', '4'); // 8

?>

]]>

</programlisting>

</example>

</refsect1>

<refsect1 role="notes">

&reftitle.notes;

<note>

<para>

Antes de PHP 7.3.0, <function>bcmul</function> podría devolver un resultado con menos dígitos después del

punto decimal que el parámetro <parameter>scale</parameter>

indicaría. Esto solo ocurre cuando el resultado no requiere toda la

precisión permitida por <parameter>scale</parameter>. Por ejemplo:

<example>

<title>Ejemplo de scale en <function>bcmul</function></title>

<programlisting role="php">

<![CDATA[

<?php

echo bcmul('5', '2', 2); // Imprime "10", no "10.00"

?>

]]>

</programlisting>

</example>

</para>

</note>

</refsect1>

<refsect1 role="seealso">

&reftitle.seealso;

<para>

<simplelist>

<member><function>bcdiv</function></member>

<member><methodname>BcMath\Number::mul</methodname></member>

</simplelist>

</para>

</refsect1>

</refentry>

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