I consider _counting_ and _indexing_ being two different concepts. In C, you declare int a[5], where 5 is the array size (element _count_), but its _indices_ ru

I consider _counting_ and _indexing_ being two different concepts. In C, you declare int a[5], where 5 is the array size (element _count_), but its _indices_ run from 0 to 4. (Indeed, an array of size n can be also viewed as a _function_ with domain [0,n-1].)