import time
def fact(n):
    return 1 if n==0 else n*fact(n-1)

time.slee[(3)]
n=int(input('Please enter the number: '))
time.sleep(3)
print('This function really helps to understands how recursion works in python')
time.sleep(3)
print( 'factorial of {} is:{}'.format(n,fact(n)))