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?>
<div id="function.log" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">log</h1>
  <p class="verinfo">(PHP 4, PHP 5, PHP 7, PHP 8)</p><p class="refpurpose"><span class="refname">log</span> &mdash; <span class="dc-title">Logaritmo natural (neperiano)</span></p>

 </div>
 <div class="refsect1 description" id="refsect1-function.log-description">
  <h3 class="title">Descripción</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>log</strong></span>(<span class="methodparam"><span class="type"><a href="language.types.float.php" class="type float">float</a></span> <code class="parameter">$num</code></span>, <span class="methodparam"><span class="type"><a href="language.types.float.php" class="type float">float</a></span> <code class="parameter">$base</code><span class="initializer"> = <strong><code><a href="math.constants.php#constant.m-e">M_E</a></code></strong></span></span>): <span class="type"><a href="language.types.float.php" class="type float">float</a></span></div>

  <p class="para rdfs-comment">
   Si el argumento opcional <code class="parameter">base</code> es
   especificado, <span class="function"><strong>log()</strong></span> devuelve entonces el
   logaritmo en base <code class="parameter">base</code>, de lo contrario
   <span class="function"><strong>log()</strong></span> devuelve el logaritmo natural
   (o neperiano) de <code class="parameter">num</code>.
  </p>
 </div>

 <div class="refsect1 parameters" id="refsect1-function.log-parameters">
  <h3 class="title">Parámetros</h3>
  <p class="para">
   <dl>
    
     <dt><code class="parameter">num</code></dt>
     <dd>
      <p class="para">
       El valor para el cual se calcula el logaritmo
      </p>
     </dd>
    
    
     <dt><code class="parameter">base</code></dt>
     <dd>
      <p class="para">
       La base logarítmica opcional a utilizar
       (por omisión, &#039;e&#039; y por lo tanto, el logaritmo natural).
      </p>
     </dd>
    
   </dl>
  </p>
 </div>

 <div class="refsect1 returnvalues" id="refsect1-function.log-returnvalues">
  <h3 class="title">Valores devueltos</h3>
  <p class="para">
   El logaritmo de <code class="parameter">num</code> en base
   <code class="parameter">base</code>, si se proporciona, o el logaritmo
   natural.
  </p>
 </div>


 <div class="refsect1 seealso" id="refsect1-function.log-seealso">
  <h3 class="title">Ver también</h3>
  <p class="para">
   <ul class="simplelist">
    <li><span class="function"><a href="function.log10.php" class="function" rel="rdfs-seeAlso">log10()</a> - Logaritmo en base 10</span></li>
    <li><span class="function"><a href="function.exp.php" class="function" rel="rdfs-seeAlso">exp()</a> - Calcula la exponencial de e</span></li>
    <li><span class="function"><a href="function.pow.php" class="function" rel="rdfs-seeAlso">pow()</a> - Expresi&oacute;n exponencial</span></li>
    <li><span class="function"><a href="function.error-log.php" class="function" rel="rdfs-seeAlso">error_log()</a> - Env&iacute;a un mensaje de error al gestor de errores definido</span></li>
   </ul>
  </p>
 </div>

</div><?php manual_footer($setup); ?>