pl/sql Basic Syntax

Q1: Print simple message
do
$$
declare
   message varchar(100):='This is my life';
begin
   
    raise notice 'The number of films: %', message;
end;
$$

Output:

NOTICE:  The number of films: This is my life


Query returned successfully with no result in 12 msec.

Q 2: Print two message

do
$$
declare
   message1 varchar(100):='This is my life';
   message2 varchar(100):='I love my life';
begin
   raise notice '% %' , message1 , message2;
   raise notice 'This is print:- %' , message2;
    -- raise notice 'The number of films: %', message;
end;
$$

Delimiters:

1.single line comments

2.multi line comment

do
$$
declare
  --single line comment
   -- message1 varchar(100):='This is my life';
   message2 varchar(100):='I love my India';
begin
--multi line comment
/*
   raise notice '% %' , message1 , message2;
   raise notice 'This is print:- %' , message2;
    -- raise notice 'The number of films: %', message;
*/
end;
$$