eli5: What do you do when you run out of variables?

Question

you refer to variables like “x” “y” “z” so on so forth, but what happens when you run out? Do you go capital do you use a special symbol or something?

In: Mathematics

Answer 1

Depends. Using a notation like a1, a2,…. is a way to do it. I come from the practical side, where variables are associated with physical properties. If in doubt, we mostly use subscript or superscript explanations what the specific one means. For example E is energy, E^0 is the standard potential of an electrode,  E°cell is the standard potential of the whole cell and so on.