#!/usr/bin/python3
# -*- coding:utf-8 -*-
# @Time:2021/5/26 14:15
# @Author:CoCo
# @微信公众号:Python编程学习圈
# @File:Ex.py
# @Software:PyCharm
#从2开始计算
i = 2
#定义一个变量用于保存结果
sum=0
while i <= 100:
if i % 2 == 0:
sum = sum + i
else:
sum = sum - i
i += 1
print("2-3+4-5+6...+100=",sum)
#!/usr/bin/python3
# -*- coding:utf-8 -*-
# @Time:2021/5/26 14:15
# @Author:CoCo
# @微信公众号:Python编程学习圈
# @File:Ex.py
# @Software:PyCharm
#从2开始计算
i = 2
#定义一个变量用于保存结果
sum=0
while i <= 100:
if i % 2 == 0:
sum = sum + i
else:
sum = sum - i
i += 1
print("2-3+4-5+6...+100=",sum)