python while 循環與 continue 語句

Question

我正在嘗試使用“while loop”打印用戶名和密碼，並且只想打印“on”的用戶狀態。

name_lst = ["koala", "cat", "fox", "hin"]
pw_lst = ["1111", "2222", "3333", "4444"]
status_lst = ["on", "off", "on", "off"]

i=0
while i < len(name_lst):
if status_lst[i] == "cat":
    continue
print("username: " + name_lst[i])
print("password: " + pw_lst[i])
i = i+1

預期結果應該是：

username: koala
password: 1111
username: fox
password: 3333

但是，我只得到以下結果。

username: koala
password: 1111

Answer 1

縮進不好，它應該是status_lst[i] == "off"而不是"cat"並且你已經創建了一個無限循環，因為當你繼續時你不增加這里是正確的代碼：

name_lst = ["koala", "cat", "fox", "hin"]
pw_lst = ["1111", "2222", "3333", "4444"]
status_lst = ["on", "off", "on", "off"]

i=0
while i < len(name_lst):
    
    if status_lst[i] == "off":
        i = i+1
        continue
    print("username: " + name_lst[i])
    print("password: " + pw_lst[i])
    i = i+1
    

Answer 2

當你可以在 if 語句中打印你想要的數據時，為什么要使用 continue 呢？

name_lst = [
   ["koala", "1111", "on"], 
   ["cat", "2222", "off"], 
   ["fox", "3333", "on"], 
   ["hin", "4444" "off"] 
]

for data in name_lst:
    username, password, status = data
    if status == "on":
        print(f"username: {username}")
        print(f"password: {password}")