I am not a web developer and this kind of grid addressing bewildered me too. Why isn't 0 the left most line as column and the top most line as row. That would

I am not a web developer and this kind of grid addressing bewildered me too. Why isn't 0 the left most line as column and the top most line as row. That would make so much more sense, IMO. What could be the reason they haven't done it this way? Or are 1 based arrays normal here?