print pl sql

1dbms_output.put_line("YOUR MESSAGE"); 

1dbms_output.put_line('hello world!'); 

1-- EXAMPLE
2SET SERVEROUTPUT ON;
3BEGIN
4DBMS_OUTPUT.PUT_LINE('This is printed. '||'This is concatenated and printed too!');
5END;
6/

1dbms_output.put_line('Hello Reader!');