ARTICLE
pass by value
Method of passing data from actual
parameters to formal parameters
when the procedure is called, which 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 passed the value of the actual parameter when they are
called. Changed formal parameters are only passed to the actual
parameter if the procedure was concluded without errors - that is,
whenever the last statement is reached or there is an exit using
RETURN (or
EXIT or CHECK ).
Refer also to pass by reference .
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