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
Stuart Robertson
Courses Plus Student 1,296 PointsProtocol Extensions Code Challenge
Am I doing this right?
import Foundation
protocol Math {
func square(value: Double) -> Double
}
extension Math {
func square(let value: Double) -> Double {
return sqrt(value)
}
}
1 Answer
Jason Anders
Treehouse Moderator 145,860 PointsHey Stuart,
You're on the right track, but there are just a couple of things.
First, when you are putting the function into the extension, you are not declaring a variable, so the let keyword needs to be deleted. You are just following the Protocol, so you just need to write the function exactly as it is above.
Second, you are not returning the square of the value (you are returning a square root). It should be return value * value
Fix those up, and you're good to go! Good Job!
Stuart Robertson
Courses Plus Student 1,296 PointsStuart Robertson
Courses Plus Student 1,296 PointsOh I see, thanks for those tips!