title: What does the % symbol mean in Prolog?
body: <p>i think this % symbol is just comment in prolog.I am not sure about it.Could you tell me if i am right?Example,i have seen this symbol like this </p>
  
  <pre><code>%path(X,Y,[X,Y]):-
  %next_to(X,Y).
  </code></pre>
  
  <p>there are comments?</p>