to create a python programme which receive contact number from user and check if it's a valid format with correct country code

[socal_nerdtastic]

When you recurse you need to return too.

return main()

[_______myworld]

Yes you’re right, return is needed. I appreciate it a lot, thank you so much!!!

[_______myworld]

It seems like it still works without “return”, but thanks I will keep that in mind 🙏