ons</span>(<span class='fl'>5</span>, <span class='fl'>2</span>)</div><div class='output co'>#&gt; [1] 10</div><div class='input'><span class='fu'>ncombinations</span>(<span class='no'>LETTERS</span>, <span class='kw'>k</span> <span class='kw'>=</span> <span class='fl'>5</span>)</div><div class='output co'>#&gt; [1] 65780</div><div class='input'>
<span class='co'># integer overflow</span>
<span class='kw'>if</span> (<span class='fl'>FALSE</span>) <span class='fu'>ncombinations</span>(<span class='fl'>40</sp