Oracle使用PLSQL编程,输出菱形
declare
m number := 3;
begin
for y in -m..m loop
for x in -m..m loop
if abs(y) + abs(x) <= m then
dbms_output.put('*');
else
dbms_output.put(' ');
end if;
end loop;
dbms_output.new_line();
end loop;
end;