code><span class="r-in"></span>
<span class="r-in"><span class="co"># Constant variable</span></span>
<span class="r-in"><span class="va">a</span> <span class="op">&lt;-</span> <span class="fl">1</span></span>
<span class="r-in"></span>
<span class="r-in"><span class="co"># Random uniform variable</span></span>
<span class="r-in"><span class="va">b</span> <span class="op">&lt;-</span> <span class="fu"><a href="portal.html">rand_uniform</a></span><span class="op">(</span><span class="op">)</span></span>
<spa