1let x = [
2  [1, 2, 3],
3  [4, 5, 6],
4  [7, 8, 9]
5];
6console.log(items[0][0]); // 1
7console.log(items[0][1]); // 2
8console.log(items[1][0]); // 4
9console.log(items[1][1]); // 5
10console.log(items);

1/*having the previous array easy to make is very useful*/
2
3function Array2D(x, y){
4 let arr = Array(x);
5  for(let i = 0; i < y; i++){
6   arr[i] = Array(y);
7  }
8  return arr;
9}
10
11function Array3D(x, y, z){
12 let arr = Array2D(x, y);
13      for(let i = 0; i < y; i++){
14       for(let j = 0; j < z; j++){
15        arr[i][j] = Array(z);
16       }
17      }
18  return arr;
19}
20
21function Array4D(x, y, z, w){
22 let arr = Array3D(x, y, z);
23      for(let i = 0; i < x; i++){
24       for(let j = 0; j < y; j++){
25        for(let n = 0; n < z; n++){
26        arr[i][j][n] = Array(w);
27       }
28       }
29      }
30  return arr;
31}
32/*making the array*/
33let myArray = Array4D(10, 10, 10, 10);