seeker0003

I'm unsure of what the name for the method I'm looking for is, making it difficult to search for. There is a method of assigning multiple options a number code, and the end user can add together the number codes of their desired choices, and then inputs the result, which is unique for every potential option combination. What I'm wondering is, would someone please tell me what the name of this method is? And maybe how to generate such codes, or a better option. I'm working on a game mod that currently requires text-parsing for option setting, and I need to enable around 12 options in the limited entry space, preferably with greatest user ease. Thanks.