I´d like to make the program end as soon as the number stops changing.

a = int(input(""))
Xn = 2
for i in range(100):
    Xu = a / Xn
    Xm = Xu + Xn
    Xn = Xm * 0.5
    print(f"{Xn}")

I think its possible with a loop and a list or something like that. I am learning programing pretty much through testing and tutorials and asking, so I don't know how to end it when it stops changing.

I mean I could just make the range 5 but it wouldn't be accurate.