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  PROCEDURE Inc( VAR variable     : <any ordinal type> [ ;
                     increment    : LongInt ]
               );
  PROCEDURE Dec( VAR variable     : <any ordinal type> [ ;
                     decrement    : LongInt ]
               );
 
  Decrement or increment an ordinal variable
 
  Unit:      System (used automatically)
 
  See also:  First, Last, Ord, Pred, Succ