0011_练习题d1

__author__ = 'qq593'
#!/usr/bin/env python
#-*- coding:utf-8 -*-
#使用while循环输入1 2 3 4 5 6 8 9 10
a=1
while True:print(a)if(a==10):breakif (a==7):a+=1continuea+=1

__author__ = 'qq593'
#!/usr/bin/env python
#-*- coding:utf-8 -*-
#求1-100所有数的和
a=1
sum0=0
while(a<=100):sum0 = sum0+aa+=1
print(sum0)

__author__ = 'qq593'
#!/usr/bin/env python
#-*- coding:utf-8 -*-
#输出1-100内所有奇数
a=1
while(a<101):if(a%2!=0):print(a)a+=1

__author__ = 'qq593'
#!/usr/bin/env python
#-*- coding:utf-8 -*-
#输出1-100内所有偶数
a=1
while(a<101):if(a%2==0):print(a)a+=1

__author__ = 'qq593'
#!/usr/bin/env python
#-*- coding:utf-8 -*-
#求1-2+3-4+5....99的所有数的和#方法一
# sumj = 0
# sumo = 0
# i = 1
# while(i<100):
#     if(i%2==0):
#         sumo+=i
#     else:
#         sumj+=i
#     i+=1
# print(sumj-sumo)#方法二：
i=1
he=0
while(i<100):if(i%2==1):he+=ielse:he-=ii+=1
print(he)

__author__ = 'qq593'
#!/usr/bin/env python
#-*- coding:utf-8 -*-
#用户登录（三次机会重试）
wtime=1
while(wtime<=3):user = input("Username:")pwd = input("Password:")if (user!="xb" or pwd!="123"):print("Username or Password wrong,Please input again!(%d/3)"%wtime)wtime+=1else:print("Login Succeed!")break