PROGRAM lexercheck;
VAR
   a : INTEGER;
   b : INTEGER;
   c : INTEGER;
   x : REAL;
   y : REAL;

BEGIN
   IF (x = y)
   THEN
   a:= 5
   z:= "happy"

{ this is a comment}
BEGIN
   BEGIN
      a := 4------3;
      b := 5 * a
      c := b DIV 4
   END;
   x := 1.1;
   y := x / 4
END.
{ program is over}