  (if (= i n)
    f0
    (fibonacci n (+ i 1) f1 (+ f0 f1))))
</pre>

which is consistent with <code>define</code>'s signature-style form.
<p>Those that favor the signature style may prefer this extension. 
In any case, it may be more appropriate to include all bound names within
the binding section.  As presented, this straightforward extension
introduces no ambiguity or incompatibility with the existing definition
of let.

<H2>Rest Arguments</H2>

As it stands, one cannot write a named let with rest argum