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

Posted by Michael Cheung
Michael Cheung
Courses Plus Student 505 Points

Dont know how to solve and not clear about how the repeat func works .

Hi can anyone help me out with this question ? I did my best but not understand what it is asking me .

loops.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 += 1

}

1 Answer

Stuart Wright
Stuart Wright
41,118 Points
Stuart Wright
Stuart Wright
41,118 Points

Your loop is correct, you just need to add a line inside it to add the current element to sum:

sum += numbers[counter]

This will need to come before you add 1 to counter.