"computeroutput">ec</code> is set such that
                  <code class="computeroutput">!ec</code> is <code class="computeroutput">true</code>, and <code class="computeroutput">n</code> is the
                  number of bytes written. If an error occurred, <code class="computeroutput">ec</code>
                  is set such that <code class="computeroutput">!!ec</code> is <code class="computeroutput">true</code>, and <code class="computeroutput">n</code>
                  is 0.<br> <br> If <code class="