Yes, we had snow, and I had to go out.
I fully understand those who don't dare though, and with a new hip, I don't think you should risk it.
However, if you have to go out, wear a pair of boots with thick rubber soles if you will be walking on uncleared roads or pavements and take a walking stick or an umbrella that is long enough to be used as a stick too for added security.
Stay if possible withing grabbing distance of a hedge, fence or branches, so if you slip you can grab something.
If roads and pavements are partially cleared or properly cleared, but you are afraid they might be slippy, pull a pair of old socks or nylons on over your boots. The cloth gives extra protection against slipping, but take the stick with you too.
Walk slowly and concentrate on what you are actually walking on. Stand still if you want to admire the view.
If you can't go out, or don't feel confident doing so, stay in.
You can get good exercise indoors walking up and down stairs twice, three times or more in succession,
If stairs are too difficult or impossible, walk the length of your room three or four times in succession.
Turn the heating right down, put on a cardie, and open a window for five to ten minutes whilst you do your exercise. This way of getting a breath of fresh air may not be as pleasant as actually being outside in it, but it is still fresh air. Close the window and turn up the heating again, keeping your extra clothing on until the room feels warm again.