Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

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

Posted by Rico Petrini
Rico Petrini
431 Points

This question will be so easy for anyone who is second course on ios development please help and thank you for your time

Help please

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 {
print(numbers[counter])
counter += 1
}

1 Answer

Steve Hunter
Steve Hunter
57,682 Points

Hi Rico,

There's a couple of points here. First, your condition is the wrong way round. You're asking it to loop while the value in counter is greater than the length of the array. The start value of counter is zero, so the loop will never run. Switch that test to seeing if counter is less than the length of numbers.

Next, inside the loop, you've incremented counter; that's essential!! You've also accessed numbers by using numbers[counter] - that's correct too. But you don't want to print it; you want to add it into sum. So change your code to sum += numbers[counter] and I think that'll pass the challenge.

I hope that helps,

Steve.