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

Ben Masel
Ben Masel
2,004 Points
Posted by Ben Masel
Ben Masel
2,004 Points

I do not completely get what I'm supposed to do! Please tell me how to complete it and why we have to!

Please tell me how to complete this task and why! I still don't completely get all types of loops so that's why i need a lot of help with them : )

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

// Enter your code below
while counter < numbers.count {counter++}
Ben Masel
Ben Masel
2,004 Points
Ben Masel
Ben Masel
2,004 Points

I forgot to mention that it was on task 2 of 2 : )

1 Answer

Jennifer Nordell
seal-mask
STAFF
.a{fill-rule:evenodd;}techdegree
Jennifer Nordell
Treehouse Teacher
Jennifer Nordell
.a{fill-rule:evenodd;}techdegree
Jennifer Nordell
Treehouse Teacher

It seems to me that you're doing pretty well so far. Now they set up a sum variable for you already and initialized it to 0. What we want to do is add up all the numbers in that array. And arrays start their numbering at 0 the same as your counter :smiley: You can access an array element by doing arrayName[0]. This would access the first item in an array named "arrayName".

And since the sum is already set up for you, inside your loop you need to add the value at the current index to the sum to create a running total. So something like sum += arrayName[index].

Keep in mind, these are just hints, but I'm hoping you can figure it out from these! Good luck! :sparkles: