#!/bin/bash/env python
# -*- coding:utf-8 -*-
#function:输出1-10每隔1秒import time
start = 1
flag = True
while flag:print(start)if start > 9:breakelse:start = start + 1time.sleep(1)print('end')

#!/bin/bash/env python
# -*- coding:utf-8 -*-
#function:输出1-10排除7import time
start = 0while True:start = start + 1if start == 7:continueelif start == 11:breakelse:print(start)time.sleep(1)print('end')

#!/bin/bash/env python
# -*- coding:utf-8 -*-
#function:求1-100的所有数之和

sum=0
start=1
while True:sum = sum + startif start == 100:breakstart = start + 1
print(sum)

#!/bin/bash/env python
# -*- coding:utf-8 -*-
#function:输出1-100内所有的奇数import time
start = 0
while True:start = start + 1if start % 2 == 0:continueif start == 99:breakprint(start)time.sleep(0.2)
print('end')

#!/bin/bash/env python
# -*- coding:utf-8 -*-
#function:输出1-100内所有的偶数import time
start = 1
while True:start = start + 1if start % 2 != 0:continueif start == 102:breakprint(start)time.sleep(0.2)
print('end')

#!/bin/bash/env python
# -*- coding:utf-8 -*-
#function:1-2+3-4+5.....99的所有数之和(结果是50)

start = 0
sum = 0
sum1 = 0
sum2 = 0
while True:start = start + 1if start % 2 ==0:sum1 = sum1 - startelse:sum2 = sum2 + startsum = sum1 + sum2if start == 99:break
print(sum)

#!/bin/bash/env python
# -*- coding:utf-8 -*-
#function：给用户三次登录的机会start = 0
while True:start = start + 1user = raw_input("Username:")pwd = raw_input("Password:")if user == "cairui" and pwd == "123":print("yes,you can do it.")breakif start == 3:break