재귀함수

def print_r(n):
    if n == 0:
        return
    print(n)
    print_r(n-1)

print_r(10)

 

 

def factorial(n):
    if n == 1:
        return 1
    return n*factorial(n-1)


n = int(input("factorial 계산 : "))
print(factorial(n))