Control Flow Defined                     ***
 IF Statement
  IF..ENDIF
  IF...ELSE...ENDIF
 FOR Loops
  FOR...NEXT
  FOR ALL...NEXT
  Looping Conditions
  WHERE Clause
  IN Clause
  OUTSIDE Clause
 WHILE Loops
  DO WHILE...ENDDO
  WHILE...ENDDO
  Looping Conditions
 LOOP
 EXIT
 DO CASE Statement
  DO CASE...ENDCASE
  CASE Clause
  OTHERWISE Clause
 SWITCH Statement
  CASE Clause
  OTHERWISE Clause