not — Apollo

9.0;not, revision 9.0, 85/03/27
NOT -- Negate a Boolean value.
usage:  NOT command


FORMAT

  NOT command


  NOT  takes  the  Boolean value returned by a command or expression and negates
  it.  This is useful primarily with the program control structures (IF,  WHILE,
  etc.)  used in Shell scripts.


ARGUMENTS

  command
  (required)          Specify  a  command  or  expression that returns a Boolean
                     value.


EXAMPLES

  Assume the following lines appear inside Shell scripts.

      #
      # Loop as long as no error file exists.
      #
      while not existf error_file
      do args "No error file yet ..."
      enddo
      # End of script



      #
      # Verify user response.
      #
      eon
      read -p "Type the pathname of the file to be deleted: " name
      read -p "Are you sure you want to delete ^name?" verification
      if not ((^verification = "yes")) then
         read -p "Please retype the pathname: " newname
         dlf ^newname
      else dlf ^name
      endif
      #
Museum
