PL/pgSQL Variables

DO $$
DECLARE
    first_name  VARCHAR(30) := 'Muhammad Rafi';
    last_name   VARCHAR(30) := 'Bahrur Rizki';
    car         VARCHAR(30) := 'Bugatti Chiron';
    years       INTEGER     := 2025;
BEGIN
    RAISE NOTICE '% % wanna buy a % in % Insya Allah', first_name, last_name, car, years;
END $$;