    Display directory stack.
    
    Display the list of currently remembered directories.  Directories
    find their way onto the list with the `pushd' command; you can get
    back up through the list with the `popd' command.
    
    Options:
      -c	clear the directory stack by deleting all of the elements
      -l	do not print tilde-prefixed versions of directories relative
    	to your home directory
      -p	print the directory stack with one entry per line
      -v	print the directory stack with one entry per line prefixed
    	with its position in the stack
    
    Arguments:
      +N	Displays the Nth entry counting from the left of the list shown by
    	dirs when invoked without options, starting with zero.
    
      -N	Displays the Nth entry counting from the right of the list shown by
    	dirs when invoked without options, starting with zero.
    
    Exit Status:
    Returns success unless an invalid option is supplied or an error occurs.
