Hello developers, please who can help explain this multi dimensional arrays

Answer 1

Let me re-format one line

int[][] sample = {
{1, 2, 3}, // array 0
{4, 5, 6} // array 1
};

sample is an array that holds arrays of integers.

sample[1] is {4, 5, 6}

if you take that and select the first element

sample[1][0] you get 4

Answer 2

It's very simple actually. Think of them like arrays where you save other arrays.

Answer 3

int[ ][ ] sample = { {1, 2, 3}, {4, 5, 6} };

int x = sample[1][0];
System.out.println(x);

// Outputs 4

Please what does this code explain