Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

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

Leopold Wohlgemuth
Leopold Wohlgemuth
603 Points
Posted by Leopold Wohlgemuth
Leopold Wohlgemuth
603 Points

Dont know Howe this Works :/

:/

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

// Enter yourcode below

while counter < numbers.count { 
sum += 
counter += 1 }

3 Answers

Heidi Puk Hermann
Heidi Puk Hermann
33,366 Points
Heidi Puk Hermann
Heidi Puk Hermann
33,366 Points

You are almost there! What you need is to tell your program what 'number' you are adding to the sum. Remember that you can access a value inside an array by using the index. See the following code for an example:

var array = [1, 2, 3]
/*accessing the first number. - remember that when we count the index, we start from 0*/
let firstIndex = array[0]

If this doesn't make sense to you, just let me know, then I can give you another hint :)