You can rent a whole flat, which most people do. This is expensive. You can also rent a room in a shared flat, which is cheaper. From the money you save, you

You can rent a whole flat, which most people do. This is expensive. You can also rent a room in a shared flat, which is cheaper. From the money you save, you can rent another room in another flat. Some of my friends even let their rooms to other people while they were out of city to save money.