DAY1_PYTHON基础作业

 '''
 print("1.使用while循环输入 1 2 3 4 5 6     8 9 10")
 count = 1
 while count < 11:
     print(count)
     count = count + 1
     if count == 7:
         count = count + 1
 '''

 '''
 print("2、求1-100的所有数的和")
 sum = 0
 count = 1 

 while count<101:
     sum = count + sum
     count += 1
     if count == 101:
         print(sum)
 '''

 '''
 print("3、输出 1-100 内的所有奇数")
 count = 0
 check = 2
 while count < 101:
     count += 1
     if count % check == 1 and count != 101:
         print(count)
     else:
         continue
 '''

 '''
 print("4、输出 1-100 内的所有偶数")
 count = 0
 check = 2
 while count < 101:
     count += 1
     if count % check == 0:
         print(count)
 '''

 print("5、求1-2+3-4+5 ... 99的所有数的和")
 sum = 0
 count1 = 1
 count2 = 1
 while count1 < 100:
     if count1 % 2 == 0:
         count2 = -count1
     elif count1 % 2 == 1:
         count2 = count1
     sum = count2 + sum
     count1 += 1
 print(sum)

 #方法二
 sum = 0
 count = 1
 while count < 100
     if count % 2 =0:
         sum -= count
     else:
         sum +=count
     count += 1
 print sum

 print("6、用户登陆（三次机会重试）")
 count = 1
 while count < 5:
     Account_num = input('请输入账号')
     Password = input('请输入密码')
     if Account_num =='Elsa' and Password == '':
         print('登陆成功')
         break
     else:
         print('登陆失败，您还有%d次登陆机会' %(4 - count))
         if 4 - count == 0:
             temp = input('是否还想再试试？')
             if temp == 'YES':
                 print('要不要脸啊你，盗号的吧')
             else:
                 print('就算你想试也没机会了，再见，哼')
     count += 1