1 for item in range(3):
 2     zh=input('请输入账号：')
 3     mm=input('请输入密码：')
 4     if zh=='admin'and mm=='123456':
 5         print('密码正确！')
 6         break
 7     else:
 8         print('密码错误！')
 9 
10 
11 
12 a=0
13 while a<3:
14     zh=input('请输入账号：')
15     mm=input('请输入密码：')
16     if zh=='admin'and mm=='123456':
17         print('密码正确！')
18         break
19     print('密码错误！')
20     a+=1
21     
22 
23 
24 
25 for item in range(1, 51):
26     if item % 5 == 0:
27         print(item)
28 print('----------------使用continue----------------------------')
29 for item in range(1, 51):
30     if item % 5 != 0:
31         continue
32     print(item)