FIT 100
© Copyright University of
Washington 1999-2000
Input vs Output
vMany programming
languages (including VB6) provide several different ways of passing values
back and
forth between the actual and the formal parameters.
vThe default in
Visual Basic, and the only kind we’ll use in CSE/IMT 100, is pass by
reference.
vPass by reference
allows information to flow in both directions.
oFormal parameters
can be used as inputs or outputs or both
oAny changes made to
a formal parameter will make a change to the corresponding actual
parameter.