// filename: index.js

 if (num<2) {

 return 1;

 }

 return num * bar(num-1);

<p><p class=”p1″ style=”margin: 0px 0px 3px; font-stretch: normal; line-height: normal; color: #dcdcdc; -webkit-text-size-adjust: auto;”><span style=”font-size: 17px;”>// filename: index.js</span></p><br /> <span style=”font-size: 17px; color: #dcdcdc; -webkit-text-size-adjust: auto;”>const bar = (num) => {</span><br /> <p class=”p3″ style=”margin: 0px; font-stretch: normal; font-size: 17px; line-height: normal; color: #dcdcdc; -webkit-text-size-adjust: auto;”><span class=”s2″>  <span class=”Apple-converted-space”> </span>if (num<2) {</span></p><br /> <p class=”p3″ style=”margin: 0px; font-stretch: normal; font-size: 17px; line-height: normal; color: #dcdcdc; -webkit-text-size-adjust: auto;”><span class=”s2″>     <span class=”Apple-converted-space”> </span>return 1;</span></p><br /> <p class=”p3″ style=”margin: 0px; font-stretch: normal; font-size: 17px; line-height: normal; color: #dcdcdc; -webkit-text-size-adjust: auto;”><span class=”s2″>  <span class=”Apple-converted-space”> </span>}</span></p><br /> <p class=”p3″ style=”margin: 0px; font-stretch: normal; font-size: 17px; line-height: normal; color: #dcdcdc; -webkit-text-size-adjust: auto;”><span class=”s2″>  <span class=”Apple-converted-space”> </span>return num * bar(num-1);</span></p><br /> <p class=”p3″ style=”margin: 0px; font-stretch: normal; font-size: 17px; line-height: normal; color: #dcdcdc; -webkit-text-size-adjust: auto;”><span class=”s2″>}</span></p><br /> <p class=”p4″ style=”margin: 0px; font-stretch: normal; font-size: 17px; line-height: normal; color: #dcdcdc; min-height: 20.3px; -webkit-text-size-adjust: auto;”></p><br /> <p class=”p3″ style=”margin: 0px; font-stretch: normal; font-size: 17px; line-height: normal; color: #dcdcdc; -webkit-text-size-adjust: auto;”><span class=”s2″>export default bar;</span></p></p>