Summing row 2d matrix

public class SummingRow {

    public static void main(String[] args) {
        // create a matrix
        int[][] matrix={
                {1,2,3},
                {4,5,6},
        };
        // outer loop controls the row number
        // inner loop advances present row to the next column
        for (int i=0; i<matrix.length; i++){
            int rowTotal=0;
            for (int j=0; j<matrix[i].length; j++){
                rowTotal+= matrix[i][j];
            }
            System.out.println("The total for row "+i+ " is "+ rowTotal);
        }

    }
}