Объясните пожалуйста

public class Solution {

    public static void main(String[] args) throws IOException {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));

        ArrayList<String> list = new ArrayList<>();
        for (int i = 0; i < 10; i++) {
            String string = reader.readLine();
            list.add(string);
        }

        String bugString = list.get(0);

        for (int i = 1; i < 10; i++) {
            if (list.get(i).length() >= bugString.length()) {
                bugString = list.get(i);
            } else {
                System.out.println(i);
                break;
            }
        }
    }
}

String bugString = list.get(0);

       for (int i = 1; i < 10; i++) {
           if (list.get(i).length() >= bugString.length()) {
               bugString = list.get(i);
           } else {
               System.out.println(i);
               break;
           }
       }