DBMS_OUTPUT « PL SQL Programming « Oracle PL/SQL Tutorial

24.22.1.Call user defined function in DBMS_OUTPUT.PUT_LINE
24.22.2.PL/SQL Block Showing the Use of the dbms_output.put_line Procedure
24.22.3.Output NUMBER with dbms_output.put_line Procedure
24.22.4.Output string with dbms_output.put_line Procedure
24.22.5.Using two single-quotes print the string correctly
24.22.6.New quoting syntax is q'[ ... ]' where the [] is the user-defined delimiter.
24.22.7.Use the LOWER function to in DBMS_OUTPUT.PUT_LINE
24.22.8.Use the ROUND function in PL/SQL