How to use the exit function in Python?

The exit function is a built-in function in Python used to terminate a program. Its usage is as follows:

1. To exit the program directly, you can use the exit() function with either exit() or exit(0). The parameter 0 signifies a normal exit, while a non-zero parameter indicates an abnormal exit.

exit()  # 正常退出程序
exit(1)  # 异常退出程序

1. Using the exit function in a try-except statement: In certain situations, we may need to exit the program when an exception occurs. This can be achieved by using a try-except statement.

try:
    # 可能发生异常的代码
    ...
except:
    # 异常处理代码
    ...
    exit()  # 退出程序

Please note:

1. When using the exit function to terminate the program, the subsequent code will not be executed.
2. It is advised to avoid using the exit function in functions or methods, as it causes the entire program to terminate rather than just exiting the current function or method. It is recommended to use the return statement to end the execution of a function or method.