tion defined with <code class="mendoza-code">defn</code> consists of a name, a number of optional
flags for <code class="mendoza-code">def</code>, and finally a function body. The example above is named
triangle-area and takes two parameters named base and height. The body of the
function will print a message and then evaluate to the area of the triangle.
</p>
<p>Once a function like the above one is defined, the programmer can use the
<code class="mendoza-code">triangle-area</code> function just like any o