The exact style depends on the convention of the language I'm using (i.e. camelCase for JavaScript, snake_case for Ruby and Python, etc). As far as the intention you can't go wrong with the principals outlined in Clean Code:
To see a summary (not by me), check out this post. Read the original if you can, as it's got many more sound recommendations that I think more developers would benefit from - it's a timeless classic for programming.