CASE CH OF
         ' ',TAB :  WRITELN( 'Found a space' );
         '0'..'9':  WRITELN( 'Found a digit' );
         'A'..'Z':  WRITELN( 'Found a capital letter' );
         OTHERWISE
                    WRITELN( 'Illegal character' );
     END;

  At run time, the system evaluates the  case  selector  'CH'  and
  executes  the  corresponding statement.  If the value of 'CH' is
  not equal to ' ', '0'..'9' or 'A'..'Z',  the  statement  in  the
  'OTHERWISE' clause is executed.