public class KonkatenasiLoop {
    public static void main(String[] args) {
        String hasil = "";

        for (int i = 1; i <= 5; i++) {
            hasil = hasil + i;
            System.out.println("Iterasi " + i + ": String baru berisi \"" + hasil + "\"");
        }

        System.out.println("Hasil akhir: " + hasil);
    }
}