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 Procedure

     (procedure and function) An executable block of code with an assigned
     name.  Alternately, the collection of source code statements that define
     a procedure.  In CA-Clipper, this can be a source file (.prg), a format
     file (.fmt), an explicitly declared procedure (PROCEDURE), or an
     explicitly declared function (FUNCTION).

     The terms procedure and function are generally interchangeable.  By
     convention, a function returns a value, while a procedure does not.