summary remember how our tic tac toe game numbered the spaces on the tic tac toe board through this sort of coordinate system might have been okay for board with less than ten spaces but the sonar board has spacesthe cartesian coordinate system we learned in the last really makes all these spaces manageableespecially when our game needs to find the distance between two points on the board locations in games that use cartesian coordinate system can be stored in list of lists so that the first index is the -coordinate and the second index is the -coordinate this make accessing coordinates look like board[ ][ythese data structures (such as the ones used for the ocean and locations of the treasure chestsmake it possible to have complicated concepts represented as dataand your game programs become mostly about modifying these data structures in the next we will be representing letters as numbers using their ascii numbers (this is the same ascii term we used in "ascii artpreviously by representing text as numberswe can perform math operations on them which will encrypt or decrypt secret messages post questions to