Python factorial code

[Larz60+]

n is not an integer, it's a string (numeric string if you entered a number).
It must be cast to integer as follows:
n = int(input("Enter a value for n:"))

better code would be:

while True:
    try:
        n = int(input("Enter a value for n: "))
        break
    except ValueError:
        print("Please use numeric values only")