python_练习

 1 #输出1 2 3 4 5 6   8 9 10
 2 '''
 3 count = 0
 4 while count < 10:
 5     count+=1
 6     if count == 7:
 7         print(' ')
 8 
 9     print(count)
10 #1-100的和
11 count = 1
12 sum = 0
13 while count <=100:
14     sum = sum + count
15     count += 1
16 print(sum)
17 
18 #3、输出 1-100 内的所有奇数
19 count = 1
20 while count <101:
21     if count % 2 == 1:
22         print(count)
23     count+=1
24 
25 #5、求1-2+3-4+5 ... 99的所有数的和
26 count = 1
27 sum = 0
28 while count <101:
29     if count % 2 == 1:
30         sum=sum-count
31     else:
32         sum = sum - count
33     count = count+1
34 print(sum)
35 
36 #6、用户登陆（三次机会重试）
37 #input 心中有账号，密码 while
38 
39 i = 0
40 while i < 3:
41     username = input('请输入账号：')
42     password = int(input('请输入密码：'))
43     if username == '咸鱼哥' and password == 123:
44         print('登录成功')
45     else:
46         print('登录失败请重新登录')
47     i += 1
48 
49 '''