I think it works here because you&#x27;re in a context where there&#x27;s just one collection. So you don&#x27;t really have to remember what c means, you can see c.size() and think &quot;this is the size of the collection&quot;, because in this context there&#x27;s only one thing you could be taking the size of.<p>If there were more than one collection, or we weren&#x27;t using it in a way that makes it obvious it must be a collection, I would want a better name.