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iOS Swift 2.0 Collections and Control Flow Control Flow With Loops Working with Loops

Luke Mann
Luke Mann
5,137 Points
Posted by Luke Mann
Luke Mann
5,137 Points

Why 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.

while.swift 
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
Sam Baldwin
7,018 Points
Sam Baldwin
Sam Baldwin
7,018 Points

Take 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"