pan class='fu'>ncombinations</span>(<span class='fl'>5</span>, <span class='fl'>6</span>)</div><div class='output co'>#&gt; [1] 0</div><div class='input'><span class='fu'>ncombinations</span>(<span class='fl'>0</span>, <span class='fl'>1</span>)</div><div class='output co'>#&gt; [1] 0</div><div class='input'><span class='fu'>ncombinations</span>(<span class='fl'>0</span>, <span class='fl'>0</span>)</div><div class='output co'>#&gt; [1] 1</div><div class='input'>
</div></pre>
  </div>
  <div class="col-md-3 