Recursive Sum of a 2D Array

What value is printed as a result of executing the following code?

public class RecursiveSum {
    public static int recursiveSum(int[][] arr, int r, int c) {
        if(r >= arr.length) return 0;
        if(c >= arr[r].length) return recursiveSum(arr, r+1, 0);
        return arr[r][c] + recursiveSum(arr, r, c+1);
    }
    public static void main(String[] args) {
        int[][] data = { {1,2}, {3,4} };
        System.out.print(recursiveSum(data, 0, 0));
    }
}