How to name a variable: numItems or itemCount?

item_count or itemCount (there's a religious war brewing there, though)

In "Code Complete," Steve McConnell notes that "Number" is ambiguous. It could be a count, or an index, or some other number.

"But, because using Number so often creates confusion, it's probably best to sidestep the whole issue by using Count to refer to a total number of sales and Index to refer to a specific sale."