for循环语句示例应用 

 1 age = 22
 2 #优化前
 3 '''
 4 for i in  range(10):
 5     guess_num = int(input('input your guess num:'))
 6     if guess_num == age :
 7         print('Congratulations ! you got it.')
 8     elif guess_num > age:
 9         print('Think smaller!')
10     else:
11         print('Think Big...')
12 '''
13 #优化后：要求输入用户名输入正确以后不执行语句
14 '''
15 for i in  range(10):
16     if i < 3:
17         guess_num = int(input('input your guess num:'))
18         if guess_num == age :
19             print('Congratulations ! you got it.')
20             break #跳出整个循环
21         elif guess_num > age:
22             print('Think smaller!')
23         else:
24             print('Think Big...')
25     else:
26         print('too many attumt.bye')
27         break
28 '''
29 #再优化：要求循环3次后询问一次
30 counter = 0
31 for i in  range(10):
32     print('counter',counter)
33     if counter < 3:
34         guess_num = int(input('input your guess num:'))
35         if guess_num == age :
36             print('Congratulations ! you got it.')
37             break #跳出整个循环
38         elif guess_num > age:
39             print('Think smaller!')
40         else:
41             print('Think Big...')
42     else:
43         continue_confirm = input('Do you want to continue because you are stupid:')
44         if continue_confirm == 'y':
45             counter = 0
46             continue #跳出本次循环
47         else:
48             print('bye')
49             break
50     counter += 1    #counter = counter + 1

 

posted @ 2016-10-12 17:04  Callum  阅读(747)  评论(0)    收藏  举报