and <code>c</code>
of type <code>real</code>, because adding a matrix to a scalar produces a matrix,
and the multiplying by a scalar produces another matrix.</p>
<p>The right-hand side expression can be a call to a user defined
function, allowing general algorithms to be applied that might not be
otherwise expressible as simple expressions (e.g., iterative or
recursive algorithms).</p>
</div>
<div id="scope-within-expressions" class="section level3 unnumbered">
<h3>Scope within Expressions</h3>
<p>Any varia