How to name variables

Question

• What rules do you use to name your variables?
• Where are single letter vars allowed?
• How much info do you put in the name?
• How about for exam

Answer 1

What rules do you use to name your variables? I've switched between underscore between words (load_vars), camel casing (loadVars) and no spaces (loadvars). Classes are always CamelCase, capitalized.

Where are single letter vars allows? Loops, mostly. Temporary vars in throwaway code.

How much info do you put in the name? Enough to remind me what it is while I'm coding. (Yes this can lead to problems later!)

what are your preferred meaningless variable names? (after foo & bar) temp, res, r. I actually don't use foo and bar a good amount.