How to use "lenght" on Scanner?

Question

https://code.sololearn.com/c5c63m646Vqy/?ref=app

Answer 1

but this way you lost scanned line and you get only its length

Answer 2

Scanner sc = new Scanner(System.in);

int stringLength = sc.nextLine().length();

System.out.print(stringLength);

Answer 3

Can you explain your idea? I don't understand where you're going with that code : )