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![Luke Mann](https://secure.gravatar.com/avatar/756f8dc15b0384e8590534761fd12540?s=96&d=https%3A%2F%2Fecs-static.teamtreehouse.com%2Fassets%2Fcontent%2Fdefault_avatar-445fbbabfc8dc9188fb5967fe43322ee0c3e0dd1e10f378bf8343784af5a13eb.webp&r=pg)
Luke Mann
5,137 PointsWhy is this not working?
I am getting the message that I need to increment the counter variable, however, the code compiles I believe that I am incrementing counter, any suggestions?
Thanks for the help.
let numbers = [2,8,1,16,4,3,9]
var sum = 0
var counter = 0
let size=numbers.count
// Enter your code below
while counter < size {
sum += numbers[counter]
counter ++
}
1 Answer
![Sam Baldwin](https://secure.gravatar.com/avatar/3035439bd2400b0b28f150f1044d5945?s=96&d=https%3A%2F%2Fecs-static.teamtreehouse.com%2Fassets%2Fcontent%2Fdefault_avatar-445fbbabfc8dc9188fb5967fe43322ee0c3e0dd1e10f378bf8343784af5a13eb.webp&r=pg)
Sam Baldwin
7,018 PointsTake the space out of "counter ++".
However, you should note that this style of incremetor is being deprecated in Swift 3. Going forward, you will need to use "counter += 1" instead. This may not work in current Treehouse courses, but it's something to bear in mind when working on your own Swift code going forward.
Moderator Edited: Moved response from comment to Answer, so it may be potentially up-voted and/or mark as "Best Answer"