Subroutine

[Former Member]

Can we call subroutine defined in Program A to Program B?

[Former Member]

Yes as long as you pass the parameters in the way it is expected by the subroutine.

You can have a statement like this in program B to call a subroutine in program A

PERFORM subroutine_of_a IN PROGRAM a TABLES .... USING .... CHANGING...

[Former Member]

What's the use of Changing in defining Subroutine

[Former Member]

Apologize Changing Keyword

[Former Member]

Typically if you want to change the value of a passing parameter within the subroutine code, you will use CHANGING. You can read the help on PERFORM which will explain all the options in detail.