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 Basics (retired) Control Flow While and Do-While Loop

Rahul Wadhavkar
Rahul Wadhavkar
1,080 Points
Posted by Rahul Wadhavkar
Rahul Wadhavkar
1,080 Points

My Code is Var Index = 0 While Index < numbers.count { println(Index) Index ++ }

Why an I getting an error? It says use "While loop"

while_loops.swift 
let numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
var [Index] = 0
 While Index < numbers.count {
    println(Index)
    Index++
 }

1 Answer

James Pamplona
James Pamplona
10,015 Points
James Pamplona
James Pamplona
10,015 Points

Swift (and most programming languages) is case sensitive. So the compiler see While uppercase differently than while lowercase. It needs to be lowercase. Also while not strictly an error, it's convention to have variables start with lowercase, so Index should be index. This helps differentiate it from class names which typically start with uppercase.