1 n = 0
 2 while n < 3:
 3     name = input("請輸入姓名：")
 4     pwd = input("請輸入密碼:")
 5     if name == "chentianjia" and pwd =="chen123..":
 6         print("歡迎光臨")
 7         break
 8     else:
 9         print("賬號密碼錯誤")
10     n = n+1
11 n = 1
12 while n<100:
13     a = n%2
14     if a==0:
15         pass
 

16     else:
17         print(n)
18     n = n+1
19 
20 name = "chentianjia"
21 test = name.center(20,"a")
22 print(test)
23 
24 name = "zhangjiaming"
25 test = name.capitalize()
26 print(test)
27 
28 name = "zhangjianming"
29 test = name.count("a",2,9)
30 print(test)
31 
32 name = "CHENTIANJIA"
33 test = name.casefold()
 
34 print(test)
35 
36 name = "ZHANGJIAMING"
37 test = name.lower()
38 print(test)
39 
40 number = "500"
41 test = int(number)
42 print(type(test),test)
43 
44 number = 500
45 print(type(number),number)
46 
47 number = 500
48 test = number
49 print(type(number),number)
50 
51 number = "500"
52 print(type(number),number)