Control Structures

BEGINNING-OF-PROGRAM
  <definitions>
    BEGINNING-OF-EXECUTION
      <stmt>;
      <stmt>;
      <stmt>;
      ...
    END-OF-EXECUTION
END-OF-PROGRAM

  BEGIN
    <stmt>;
    <stmt>;
    <stmt>;
    ...
  END;

  IF <test>
    THEN <stmt>
    [ ELSE <stmt> ]

  ITERATE <positive-integer> TIMES
    <stmt>

  WHILE <test> DO
    <stmt>

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