How do I calculate the factorial of a number in a program in Python 3?

Question

I need help creating a program that calculates the factorial of a number, I think I have the concept down but I need help with the rest.

x = input(int('Input a number that you would like the factorial of \n'))

while x > 1:
x = x * (x - 1)

print(x)

Answer 1

n = input("Enter the number")
for i in range(n)
x = x * i
print(x)

Answer 2

If you do that, x will never be <= 1.
So, set other variable that works like the number you will multiply.
n = input(int("bla"))
x = 1
while n > 1:
x *= n
n -= 1
print(x)

# x *= n its the same like x = x * n