Suppose we have an array. Array(3). The user has written 5, 6, and 7 to (0) (1) (2) within that array.
How would I add them up? If it's like Array(0) + Array(1) + Array (2) that's all very well but..
What if the array size was (10). How could I add up only the filled element. ASAIK, adding up elements that have not been assigned data to will cause very wierd and bad things to happen.