Construct the Grid: Start creating the grid by forming a row of cells equal in number to your selected key. Example: Create a row with six cells. / -- / -- / -- / -- / -- / -- / Populate Initial ...

Think of grid[x][y] as being the character at the x- and y-coordinates of a “picture” drawn with text characters. The (0, 0) origin is in the upper-left corner, the x-coordinates increase going right, ...