How does a video game designer use math in designing a game

It varies very much by the type of coding the designer* is creating. But commonly similar between all video games is the coding and scripting of the game. There are a lot of variables that have to be defined so the game can function with limitations etc. For coding such as java, one has to use math to predefine a system of numbers for things such as ; size of maps, damage ( if it is that type of game ) , etc.