This is the most common confusion in the whole of programming, so it is worth slowing down for:

print shows a value on the screen, for a person to read. The program can't use it afterwards.
return gives a value back to the program, which can then do anything with it.

def double_print(n):
    print(n * 2)

def double_return(n):
    return n * 2

x = double_print(5)
y = double_return(5)
print("x is", x)
print("y is", y)

double_print showed 10, but gave nothing back, so x is None. double_return showed nothing, but y holds 10, ready to use. A function without a return gives back None.