sourceLine" id="cb1-4" data-line-number="4">    F[n] &lt;-<span class="st"> </span>F[n <span class="op">-</span><span class="st"> </span><span class="dv">1</span>] <span class="op">+</span><span class="st"> </span>F[n <span class="op">-</span><span class="st"> </span><span class="dv">2</span>]</a>
<a class="sourceLine" id="cb1-5" data-line-number="5">} <span class="op">%where%</span><span class="st"> </span>{</a>
<a class="sourceLine" id="cb1-6" data-line-number="6">    n &lt;-<span class="st"> </span><span