#1.使用while循环输出 1 2 3 4 5 6  8 9 10

 i = 1

 while i < 11:

     if i == 7 :

         print(' ',end='')

     else:

         print(i,end=' ')

     i = i + 1

 #2.求1-100所有数的和

 i = 1

 sum = 0

 while i < 101:

     sum = sum + i

     i += 1

 print(sum)

 #3.输出1-100内的所有奇数

 i = 1

 while i < 101:

     if i % 2 ==1:

         print(i)

     i += 1

 #4.输出1-100以内的所有偶数

 i = 1

 while i < 101:

     if i % 2 ==0:

         print(i)

     i += 1

 #5.求1+2+3+4+5+...+99的和

 i = 1

 sum = 0

 while i < 100:

     sum = sum + i

     i += 1

 print(sum)

 #6.用户登录，三次机会重试

 i = 3

 while i > 0:

     name = input("请输入您的姓名：")

     password = input("请输入您的密码：")

     i = i - 1

 #假设用户名为：小二；密码为：123456

     if name == '小二' and password == '':

             print("登录成功！")

             break

     else:

         print("账号密码不匹配，请重新输入，您还有" +str(i)+ "次机会！")

     if i == 0:

         print("当前次数已用完，您的账户已锁定，请联系客服解锁！")