The structure of space
When creating a universe, you have to begin somewhere. A good starting point is to define its shape.
The most convenient and probably the most obvious shape is a cube. Each of the three coordinates is then a number from the same range and it is very easy to make it so that there are no boundaries - it is enough to add a condition that leaving the cube on one side is equivalent to entering it on the other side. It is similar to the well-known Snake game, where the snake leaving the screen on the right returned from the left - just in three dimensions.
So we have a cubic space made of points described by three numbers: . A question arises: what data type will be best for representing the coordinates of a point? The answer requires us to check the size of the numbers involved first.