ARRAYS!!

So in programing class, we've begun to work with arrays.
A simple enough idea, this is a group of alike variables, all held together in a package, which you are then able to call from. this is a means allowing you to not have to make countless tons onf calls to variables, if you know that they all are contained in the same place.
Okay, to be honest, the concept still sort of confuses me as to their full usefulness, but I'm sure that will come in time. A friend explained it to me, as though i were thinking of an old school game inventory system. That matrix of squares is usually based on some system of arrays. perhaps as i delve deeper and deeper into this dark abyss known as programming, I'll get a firmer grasp. until such a time, enjoy my disco lights and spikey deaths.