求1-100的所有数的和

#!/usr/bin/env python
# -*- coding: utf-8 -*-
# @Time    : 2018/5/6 0006 10:25
# @Author  : Anthony.Waa
# @Site    : 
# @File    : 求1-100的所有数的和.py
# @Software: PyCharm


# demo1
# 定义基数
sum = 0
count = 1

# 循环开始
while count < 101:
    sum += count
    count += 1
print(sum)


# demo2
定义基数
sum = 0

# 循环开始
for count in range(1,101):
    sum += count
print(sum)


# demo3
# 定义基数
sum = 0
count = 0

# 循环开始
while True:
    if count == 100:
        break
    else:
        count += 1
        sum += count
print(sum)