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):
        break
    if (a==7):
        a+=1
        continue
    a+=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+a
    a+=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+=i
    else:
        he-=i
    i+=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!=""):
        print("Username or Password wrong,Please input again!(%d/3)"%wtime)
        wtime+=1
    else:
        print("Login Succeed!")
        break