u will have
to use the <code class="keyword">fconfigure</code> command.</li>

<li>Often, especially if you deal with configuration data for your
programs, you can use the <code class="keyword">source</code>
command instead of the relatively low-level commands presented
here. Just make sure your data can be interpreted as Tcl commands
and "source" the file.</li>
</ul>

<hr>
<h2>Example</h2>

<pre class="example">
#
# Count the number of lines in a text file
#
set infile [open "myfile.txt" r]
set number 0

#
