topic Re: changing in Application Development and Automation Discussions

changing

Former Member — Sat, 16 Feb 2008 12:36:01 GMT

difference between changing and using in subroutines

Re: changing

former_member156446 — Sat, 16 Feb 2008 12:39:27 GMT

if in the subroutine if you want to change any value...pass as changing parameter.

if you just want to use the variable pass as using parameter..


perform using lv_using changing lv_change.

form using p_lv_using changing p_lv_change.

p_lv_change = p_lv_change * 2.

p_lv_using = p_lv_using * 2. " <<< not possible as its using parameter.

Re: changing

Former Member — Sat, 16 Feb 2008 12:48:02 GMT

If u modify the parameter in subroutine which is passed to ur subroutine as using and Once u come out of the subroutine the variable value will be same as what u had before calling the subroutine.

But if u use changing ur variable will be changed to the new value when u come out of the subroutine.

Rgds

sathar

Re: changing

Former Member — Sat, 16 Feb 2008 13:05:14 GMT

Hi,

Using is used in subroutines when u just pass the value of a variable and u never change that value in the so called form u r just supposed to use it.

for example

form <name> using w_no type i.

*local variables declaration.

data:

lw_data type i.

lw_data = w_no + 2.

endform.

see here u sed the value of w_no but u have not changed it..

form <name> changing w_no type i.

w_no = w_no + 2.

endform.

see here u changed the value of w_no so here u have to use changing

i hope i am clear to u..

reward if helpful..