trong>file</strong></td>
            <td>

            </td>
        </tr>
    </tbody>
  </table>

    <h4>
    Return Value
    <small>integer</small>
    </h4>
    

    </div>
  </div>

              <div class="card">
    <div class="card-header codesum"><span class="anchor" id="proc-output"></span> <h3>public  function <a href='../proc/output.html'>output</a>(file) result(unit)  
</h3></div>
    <div class="card-body">
          
  <p>Open an output file for writing.</p>

  <h4>Arguments</h4>
      <t