PL/SQL DBMS_OUTPUT package

DBMS_OUTPUT is an Oracle-supplied PL/SQL package and PUT_LINE is one of the packaged procedures. It displays the values on the SQL*Plus terminal which must be enabled with SET SERVEROUTPUT ON first. To execute this code sample, login into SQL*Plus, and type

SQL> SET SERVEROUTPUT ON
SQL> BEGIN
  2     DBMS_OUTPUT.PUT_LINE('Hello');
  3     DBMS_OUTPUT.PUT_LINE('w3reference');
  4  END;
  5  /
Hello
w3reference

PL/SQL procedure successfully completed.
SQL>