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

Maria Alonso
Maria Alonso
7,498 Points

dont understand

what is that i have to do

let numbers = [2,8,1,16,4,3,9]
var sum = 0
var counter = 0

// Enter your code below

while counter < numbers.count {
  [counter += 1] = sum + 2 + 8 + 1 + 16 + 4 + 3 + 9

1 Answer

Steve Hunter
Steve Hunter
Treehouse Moderator 57,657 Points

Hi there,

You've got the loop correct; the last part of the loop code needs to be the increment of counter, as you have done - just put that on a separate line without the square brackets.

Now, the first line inside the loop needs to add an element of numbers into the accumulative variable named sum.

How to access numbers? Use counter inside square brackets, like numbers[counter]. Use += to add numbers[counter] into sum then increment counter as above.

Does that make sense?