What's the difference between VAR and _VAR_?

[Johnny Lee]

Erik Max Francis wrote:
>
> You're going to have to be more clear; I don't understand your question.
>   What's the difference between
>
> 	a = 1
>
> and
>
> 	b = 1
>
> besides the difference of name?
>

I thought there must be something special when you named a VAR with '_'
the first character. Maybe it's just a programming style and I had
thought too much...