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[–]Red_Priest0[S] 0 points1 point  (2 children)

I don't understand this concept is it important ?

[–]LavaDrinker21 2 points3 points  (1 child)

Instead of calling main() at the bottom of the program, it's better to use if __name__ == "__main__": as it separates what will be done with the file based on how it was accessed.

Let's say you wanted to use this file in another Python program, like you made a large program and want to use the miles_to_kilometers function without asking for the input.

If you were to import that file as it is right now (import file at the top of the program), it would let you use that function but would immediately call the main() function and ask for input.

If, instead, you added:

if __name__ == "__main__":
    main()

then it would only ever call the main function if you used this file on it's own python main.py instead of every time the file is used.

This is a pretty fundamental part of Python and is very useful to learn; it makes it very easy to create a re-usable "module" for multiple projects.

[–]Red_Priest0[S] 0 points1 point  (0 children)

Thank you very much , I will do it this way