public class Main {
        public static void main(String[] args) {

            int weeks = 2;
            int weekDays = 5;

            // outer loop prints weeks
            for (int i = 1; i <= weeks; ++i) {
                System.out.println("Week: " + i);

                // inner loop prints weekdays
                for (int j = 1; j <= weekDays; ++j) {
                    System.out.println("  Day: " + j);
                }
            }
        }
    }
/* Output:
Week: 1
  Day: 1
  Day: 2
  Day: 3
  Day: 4
  Day: 5
Week: 2
  Day: 1
  Day: 2
  Day: 3
  Day: 4
  Day: 5
*/