Above 3D array, we can write like this
array[0] => [0] => [0, 1]
[1] => [0, 1]
[2] => [0, 1]
array[1] => [0] => [0, 1]
[1] => [0, 1]
[2] => [0, 1]
array[2] => [0] => [0, 1]
[1] => [0, 1]
[2] => [0, 1]
Clearly Here A[1] and A[0] are 3 steps away.
A[1][0] and A[0][0] are 6 Steps away.
For 4 D array you can write like this.
int array[2][3][2][5];
array[0] => [0] => [0] => [0, 1, 2, 3, 4]
[1] => [0, 1, 2, 3, 4]
[1] => [0] => [0, 1, 2, 3, 4]
[1] => [0, 1, 2, 3, 4]
[2] => [0] => [0, 1, 2, 3, 4]
[1] => [0, 1, 2, 3, 4]
array[1] => [0] => [0] => [0, 1, 2, 3, 4]
[1] => [0, 1, 2, 3, 4]
[1] => [0] => [0, 1, 2, 3, 4]
[1] => [0, 1, 2, 3, 4]
[2] => [0] => [0, 1, 2, 3, 4]
[1] => [0, 1, 2, 3, 4]