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pass by value

Method of passing data from actual parameters to formal parameters when the procedure is called. The method is defined in the parameter interface of a procedure. In pass by value, a local data object is created as a copy of the actual parameter. Output parameters and return values are initialized when the procedure is called. Input parameters and input/output parameters are given the value of the actual parameter when they are called. Modified formal parameters are only passed to actual parameters if the procedure was concluded without errors, that is once the last statement is reached or if there is an exit using RETURN (or EXIT or CHECK). See also pass by reference.


Other versions: 7.31 | 7.40 | 7.54