How to traverse through 2d array

public static boolean isGPM(int[][] matrix) {
        boolean gpm = true;
        int count =0;
        for (int row = 0; row < matrix.length; row++){
            count =0;
             for (int col = 0; col < matrix[row].length; col++)
             {
             if (matrix[row][col] > 0){
             count++;
             }
             else {
                return !gpm;
             }
                }
            }
            System.out.println(count);
            return gpm;
            }