oftware-lab.de/demoApp.tgz">demoApp.tgz</a>). To get an
interactive prompt, start it as

<pre>
$ pil app/main.l -ap~main +
:
</pre>

<p>As ever, you can terminate the interpreter by hitting <code>Ctrl-D</code>.

<p>For a first, typical example, let's write a complete call to <a
href="refS.html#solve">solve</a> that returns a list of articles with numbers
between 1 and 4, which contain "Part" in their description, and have a price
less than 100:

<pre>
(let (Nr (1 . 4)  Nm "Part"  Pr '(NIL . 100.00))
   (sol