Explain answer plz?

Question

C challenge question.
https://code.sololearn.com/cRD6G38nJAJF/?ref=app

Answer 1

●So its related to global variable and local variable.
●So when int i is declared in f() it is different from global i=10 initialized at first.so as function call ends local i dies.
●but in g() i is reassigned 9 without declaring.so the compiler presumes it as global i.hence, the global i is now 9.

Am i correct?

Answer 2

You are correct!

Notice, too, that you get a warning on unused variable i in f(), but not in other places.