The RETURN statement passes control back  to  the  caller  of  a
  PROCEDURE,   FUNCTION,  PROGRAM,  or  module  initialization  or
  finalization section.  A RETURN statement  is  equivalent  to  a
  GOTO to a label placed just before the END of the body, and in a
  PROGRAM, has the effect of stopping the program

  Syntax:

  RETURN [ return-value ]

  Inside a FUNCTION, return-value specifies an  ending  value  for
  the  FUNCTION.   If  no return-value is provided, the last value
  assigned to the function identifier  is  used  as  the  function
  result.   The  return-value  type  and function type must be the
  same.

  Inside a PROGRAM, the return-value specifies an ending value for
  the  PROGRAM.   If you do not provide a return-value, VSI Pascal
  uses the value 1 on OpenVMS systems.

  Inside a PROCEDURE, module  initialization  section,  or  module
  finalization section, VSI Pascal generates an error.