title: CodeAcademy Battleships 7/19 python course
body: <pre><code>def random_row(board):
       return randint(0 , len(board) - 1)
  def random_col(board):
       return randint(0, len(board)-1)
  </code></pre>
  
  <p>My question is why is (len(board) - 1) instead of len(board)?</p>