4. What does the following segment of Java code do? Try figuring it out just from reading the code, then plug it into Netbeans and see if you were correct. If not, write out your explanation. Scanner stdin = new Scanner (System.in); System.out.println("Enter n."); int n = stdin.nextInt(); int total = 0; while (n > 0) { total - total + n$10; n = n/10; I } System.out.println(total)