This tutorial we’re looking at 2D arrays. These are grids of variables.
This tutorial is also quite an in depth look at the way a nested for loop behaves. Multidimensional arrays and nested for loops go hand in hand.
The important things to be able to do are:
Read any particular box in the 2D array
Write to any particular box in the 2D array
Iterate through every box in the array one after the other