Counterpoint: using anything other than ‘i’ as your index in a for loop in C or C++ is obnoxious as fuck.

At most I’ll go with ‘it’ for C++ iterators.

Unless you are implementing some mathematical formula. Then link the paper and stick to its variables.

I have a convention to correlate the size of variable scope with its name length.

If a variable is used all over the program, it will be named “response”. If it is <15 lines, then it can be “res”. If it is less than 3 lines, it can be only “r”.

This makes reading code a bit simpler, because it makes unimportant, local vars short and unnoticeable.

Sometimes you’re just using it once and it’s blindingly obvious what it is

Mostly agree. I’m ok with single characters in a one line / single expression lambda, but that’s the only time I’m ok with it.