How to make a factorial?

Question

n=int(input("number : "))
sum=0
while n:
print(n, "*")

if n==0:
break
print(sum)

Answer 1

Here are a few suggestions for your code -

The first would be to a condition in your while statement that replaces the if statement within it, setting it so that the while statement will only run while n is greater than 0:

while n > 0:
statements

Next, as the factorial of a number is that number multiplied by every other number below it, I would set a second variable to be equal to one (in this case sum will work as that variable), so you can multiply n by something as it decreases.

To find the actual calculations of the factorial of n, I would recommend setting sum (which should equal 1 initially) to equal the value of sum multiplied by n, having n decrease by one after every iteration of the loop:

while n > 0:
sum *= n
n -= 1

Hope this helped! d:

Answer 2

wow good ideas!!
thank you so much Faisal and Jan Markus!! have a great day :):)