COMMENTS
      In a non-interactive shell, or an interactive shell in which the interactive_comments option to the shopt
      builtin is enabled (see SHELL BUILTIN COMMANDS below), a word beginning with # causes that word  and  all
      remaining  characters  on that line to be ignored.  An interactive shell without the interactive_comments
      option enabled does not allow comments.  The interactive_comments option is on by default in  interactive
      shells.