This tag is for all questions related to the teaching of number systems as embodied in programming languages.
Modern programming languages implement some version of a number of mathematical number systems in various bases; binary, octal, etc. Novices usually benefit from learning something about these number systems and the restrictions imposed by implementing them on finite machines.
Use this tag for questions related to the teaching of such number systems, including the common ones (int, float) and those a bit more esoteric (BigNum).
The tag (and the site) are not appropriate for technical questions about number systems except as they relate to the teaching/learning of the concepts.