SQL>
SQL> create or replace procedure add_up
2 (p1 in number DEFAULT 0,
3 p2 in number DEFAULT 0,
4 p3 out number)
5 as
6 begin
7 p3 := p1 + p2;
8 end;
9 /
Procedure created.
SQL>
SQL> show errors
No errors.
SQL>
SQL> -- execute from SQL*Plus:
SQL>
SQL> var x number
SQL> exec add_up(10,10,:x)
PL/SQL procedure successfully completed.
SQL> print x
X
----------
20
SQL>