def calc_fact(a): if(a>0): else: n=int(input("Please input any positive number to calculate it's factorial\n")) print "

Question

Help in this code

Answer 1

Technically, factorial of 0 should be 1. Please find your required code below:

def calc_fact(a):
if(a==0):
return 1
if(a>0):
return a*calc_fact(a-1)
return 1
def check_input(a):
if(a<0):
check_input(int(input("Please enter a positive integer for its factorial\n: ")))
else:
print("factorial of {} is {}".format(a, calc_fact(int(a))))
check_input(int(input("Please enter a positive integer for its factorial\n: ")))