 <span class="st">"range"</span><span class="op">)</span></span></span>
<span class="r-out co"><span class="r-pr">#&gt;</span> $initial</span>
<span class="r-out co"><span class="r-pr">#&gt;</span>    de range </span>
<span class="r-out co"><span class="r-pr">#&gt;</span>     1    20 </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> $is_known</span>
<span class="r-out co"><span class="r-pr">#&gt;</span>    de range </span>
<span cla