How remove() works in loops

Main.java

import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        ArrayList<String> list = new ArrayList<>();
        list.add("A");
        list.add("B");
        list.add("C");
        for (String str : list) {
            if ("B".equals(str)) {
                list.remove(str);
            } else {
                System.out.println(str);
            }
        }
    }
}

// Result: A