Question

Using python, please explain.

The factorial of an integer N is the product of the integers between 1 and N, inclusive. Write a while loop that computes the factorial of a given integer N.

Answer 1

# Reading input number from user
N = int(input("Enter value for N: "))

# Initializing i to 1
# During the while loop value of i starts from i to N 
i = 1

# Initializing fact to 1
# The factorial is the product of value of i 
fact = 1

# Looping from 1 to N
while(i<=N):
    # multiplying fact with value of i
    fact = fact * i
    # incrementing the value of i
    i=i+1
# Printing the calculated factorial
print(fact)