def factorial(n): result = n for i in range(1, n): result *= i return resultnumber = int(input("请输入一个正整数："))result = factorial(number)print("%d的阶乘是：%d" %(number, result))-----

def factorial(n): if n == 1: return 1 else: return n* factorial(n - 1)number = int(input("请输入一个正整数："))result = factorial(number)print("%d的阶乘是：%d" %(number, result))

斐波那契数列

def f(n): if n == 1: ret = 0 elif n == 2: ret = 1 else: ret = f(n-1)+f(n-2) return retprint(f(4))

def f(n): if n == 1: return 0 elif n == 2: return 1 return f(n-1)+f(n-2)print(f(5))