SQL>
SQL> CREATE OR REPLACE PROCEDURE showvals
2 (p_a_txt IN VARCHAR2 DEFAULT NULL,
3 p_b_txt IN VARCHAR2 DEFAULT NULL) IS
4 BEGIN
5 HTP.PRINT('a = '|| p_a_txt || HTF.BR);
6 HTP.PRINT('b = '|| p_b_txt || HTF.BR);
7 END showvals;
8 /
Procedure created.
SQL>