The factorial of a number is the product of all the integers from 1 to that number.
For example, the factorial of 6 is 1*2*3*4*5*6 = 720. Factorial is not defined for negative numbers and the factorial of zero is one, 0! = 1.
Source Code
# Factorial of a number using recursion
def recur_factorial(n):
if n == 1:
return n
else:
return n*recur_factorial(n-1)
num = 7
# check if the number is negative
if num < 0:
print("Sorry, factorial does not exist for negative numbers")
elif num == 0:
print("The factorial of 0 is 1")
else:
print("The factorial of", num, "is", recur_factorial(num))
Output
The factorial of 7 is 5040
Note: To find the factorial of another number, change the value of num.
Here, the number is stored in num. The number is passed to the recur_factorial() function to compute the factorial of the number.
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