# -*- coding: UTF-8 -*-

# Filename : test.py

# author by : www.dida100.com

# Python 斐波那契数列实现

# 获取用户输入数据

nterms = int(input("你需要几项？"))

# 第一和第二项

n1 = 0

n2 = 1

count = 2

# 判断输入的值是否合法

if nterms <= 0:

   print("请输入一个正整数。")

elif nterms == 1:

   print("斐波那契数列：")

   print(n1)

else:

   print("斐波那契数列：")

   print(n1,",",n2,end=" , ")

   while count < nterms:

       nth = n1 + n2

       print(nth,end=" , ")

       # 更新值

       n1 = n2

       n2 = nth

       count += 1