Control Statements :

  These control the flow of execution of your program

  If/ElseIf/Else/Endif/And.. Argument Operator Argument
  IfExists/Else/EndIf..       SYSTEM  Name|~Name
  While/EndWhile/And/Or      Argument Operator Argument
  Mark/Goto                  MarkName
  DoCase/Case/Break/EndCase  (DoCase) Argument - Case Operator Argument
  Stop                       

 ARexx capable control statements :

  Gosub/Return               GuiName RoutineName  (ARexx capable)
  Quit