이하 수업내용
int[][] arr = new int[3][3];
arr[0][0] = 10;
arr[0][1] = 20;
arr[0][2] = 30;
arr[1][0] = 40;
arr[1][1] = 50;
arr[1][2] = 60;
arr[2][0] = 70;
arr[2][1] = 80;
arr[2][2] = 90;
for (int i = 0; i < arr.length; i++) {
for (int j = 0; j < arr[i].length; j++) {
System.out.print(arr[i][j] + " ");
}
System.out.println();
}
for (int i = 0; i < arr.length; i++) {
System.out.println(Arrays.toString(arr[i]));
}