title: Are literal strings and function return values lvalues or rvalues?
body: <ol>
  <li><p>Just wonder if a literal string is an lvalue or an rvalue. Are other literals (like int, float, char etc) lvalue or rvalue? </p></li>
  <li><p>Is the return value of a function an lvalue or rvalue?</p></li>
  </ol>
  
  <p>How do you tell the difference?</p>