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

Alex Nelsen
PLUS
Alex Nelsen
Courses Plus Student 2,977 Points
Posted by Alex Nelsen
Alex Nelsen
Courses Plus Student 2,977 Points

How do you add the numbers in an array?

What is the syntax for adding numbers in an array

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 { numbers[] 
}

2 Answers

Tobias Mahnert
Tobias Mahnert
89,414 Points
Tobias Mahnert
Tobias Mahnert
89,414 Points

Hi Alex,

first of all you need to increment the counter variable with counter++ then you add the indexvalue from the numbers array like in the example below. Any questions let me know

Cheers TOby

while counter < numbers.count {
sum += numbers[counter]
counter++
}