PL SQL Oracle PLSQL

SQL>
SQL> -- DBMS_OUTPUT package
SQL>
SQL>
SQL>
SQL> SET SERVEROUTPUT ON
SQL> BEGIN
  2     DBMS_OUTPUT.PUT_LINE('Hello');
  3     DBMS_OUTPUT.PUT_LINE('there');
  4  END;
  5  /
Hello
there
PL/SQL procedure successfully completed.
SQL>
SQL>