Why a class or id can't be started with a number?

Answer 1

It can (in HTML and JS, that's what i did in my code "ChessBoard") it is impossible in CSS though…… ~_~

Answer 2

thank you @valentinhacker

Answer 3

iI think it has to do with how the computer memory works, if its a number first on the name it (the compiler or browser) confuses that name with the memory adress name which starts with numbers

Answer 4

in computer programming it is a convention you can't store memory any variable that starts with a number