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 Introduction to Collections Working With Arrays

Daniel Lambrecht
Daniel Lambrecht
iOS Development Techdegree Student 5,302 Points

the index starts at 0

the index starts at 0 so i should retrieve item no. 6 right? keeps gettting a bummer! note

// Enter your code below

var arrayOfInts = [1,2,3,4,5,6]


arrayOfInts += [8]

let value = arrayOfInts[6]

1 Answer

28,558 Points

Indexes does start at 0, but that means that indexes are one less than you might expect them to be, not one above. Item 1 is at index 0, item 2 at index 1, item 3 at index 2, item 4 at index 3, item 5 at index 4.

So you have to use [4] to retrieve the fifth item, which is the item the task asks you to retrieve.