interface of the list in c++
<p>I found some interface for the list:
and there I found this constructor</p>

<pre><code>template&lt;typenameT&gt;
...

list(size_tnum, constT&amp; val = T());
...
</code></pre>

<p>can somebody explain what is this:  <code>constT&amp; val = T()</code></p>

<p>thanks in advance</p>
