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

Having trouble accessing value of array and add it to "sum/newValue"

I need to use counter as an index. access the array and add the new value to sum. feel like i tried everything and nothing is working.

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

// Enter your code below
while counter < 7 {

1 Answer

Ali Amin
Ali Amin
1,295 Points

As the hint says you can use the count property in Array to get the number of items in you array instead of counting them

while counter < numbers.count

What if you don't have access to the array? (if it was passed to you in a function or populated via a for loop) it is always better to use the solution that will work under any conditions.