public static void main(String[] args) {
                 int arr[] = new int[] {15,3,21,11};
                 System.out.println(task4(arr));
}

public static int[] task4(int arr[]){
             return arr ;
}

System.out.println(Arrays.toString(task4(arr)));

public class TEST {
    public static void main(String[] args) throws IOException {
        int arr[] = new int[] {15,3,21,11};
        task4(arr);
    }

    public static void task4(int[] arr){
        for(int i : arr){
            System.out.println(i);
        }
    }
}