Python code: While loop with if statement

[HAMOUDA]

Dear Friend,
I am a beginner in python.
I find it hard to understand the logic of the following issues:
1- why we use empty string?
2-Why when you right "start" for the second time you get "car already-started"

Your help will be appreciated.

Note: It is a code for a game. the code is long but I have selected the section that I did not understand.

command = "" 
already_started = False
while command != "quit":
   command = input(">").lower()
   if command == "start":
        if already_started:
            print("car already started")
        else:
            already_started = True
            print("car already started")
            print("car started")

Output:
>start
car started
>start
car already started

buran write Sep-18-2023, 09:48 AM:
Please, use proper tags when post code, traceback, output, etc. This time I have added tags for you.
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