I've just recovered from my first real foray into LaTeX3 programming. It was ... an experience. Not a completely unpleasant one and once I'd gotten used to the syntax then I found it a lot easier ...
I am trying to learn the LaTeX3 syntax. One of the questions I have come up with is how to define a variable, i. e. a macro without arguments in TeX parlance, with local scope within a group. In TeX ...