"Using" Versus "Changing"

[syerazvi]

DATA V TYPE I.
v = 20.
write / v.
perform change1 using v.
write / v.
FORM CHANGE1 using P_V.
p_v = 40.
write / p_v.
ENDFORM.

I am getting the below only on doing F8 when i use USING as well as when CHANGING. What can i do to get 20 40 20 instead?

20

40

40

Best,Ahmed

[matt]

PERFORM is obsolete. Don't use it.

Anyway, the behaviour is adequate explained in the documentation. Under effect, under additions 2 and 3.