uments is indicated by
    writing the period ('.') character on a line by itself (again, terminated
    with a newline).

    <p>
    For example, a Perl script reading its arguments from <code>stdin</code>
    would use something like:
<pre>
    while (my $line = &lt;STDIN&gt;) {
      chomp($line);

      if ($line eq ".") {
        last;
      }

      # Handle $line appropriately here
    }
</pre>
    The advantange of using this <code>useStdin</code> option is that some
    systems have tools (<i>e.g.