PL/pgSQL IF statement

do $$
declare
    x integer := 50;
    y integer := 50;
begin
    if x > y then
        raise notice '% is greater than % ', x, y;
    elseif x < y then
        raise notice '% is lees than %',x, y;
    else
        raise notice '% is equal to %', x, y;
    end if;
end $$;