Question 3 4 pts Given a number n by user input, which of the following programs

Question

Question 3 4 pts
Given a number n by user input, which of the following programs calculates the factorial of n?

Hint: The factorial of 5 is 5 * 4 * 3 * 2 * 1.

(There could be more than one correct answer.)

n = int(input())

fact = n
while n >= 2:
    n -= 1
    fact *= n

print(fact)

n = int(input())

fact = 1
i = 1
while i <= n:
    fact *= i
    i += 1

print(fact)

n = int(input())

fact = 1
while n >= 1:
    fact *= n
    n -= 1

print(fact)

n = int(input())

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

print(fact * n)

Explanation / Answer

1.

n = int(input())

fact = n
while n >= 2:
    n -= 1
    fact *= n

print(fact)

fact = (n-1)*(n-2)*(n-3).............*2------ not factorial function

2.

n = int(input())

fact = 1
i = 1
while i <= n:
    fact *= i
    i += 1

print(fact)

fact = 1*2*3*4...........*n ---------- factorial

3.

n = int(input())

fact = 1
while n >= 1:
    fact *= n
    n -= 1

print(fact)
fact = 1*n*(n-1)*(n-2)*(n-3)*....*1----- factorial

4.

n = int(input())

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

print(fact * n)

fact = 1*n*(n-1)*(n-2)*............*0 = 0 , Not factorial function

Thus correct factorial functions are 2 and 3

Do ask if any doubt. Please upvote.

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