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 Object-Oriented Swift Properties Computed Properties

Posted by Marco Garduño
Marco Garduño
1,549 Points

help

little help please

Temperature.swift 
class Temperature {
    var celsius: Float = 0.0
    let fahrenheit
let fahrenheit {
   return (Celsius * 1.8) + 32)
   }
}

1 Answer

Tobias Helmrich
Tobias Helmrich
31,603 Points
Tobias Helmrich
Tobias Helmrich
31,603 Points

Hey Marco,

computed properties must be variables but you're declaring fahrenheit as a constant. Also you're making two fahrenheit constants, so make sure to remove the first one. Also note that you have only one opening but two closing parenthesis in your return statement, actually you don't need any parenthesis at all in this case. It's also fine if you use them but make sure to remove the last parenthesis.

Lastly also make sure to declare the fahrenheit computed property as a Float type.

Like so:

class Temperature {
    var celsius: Float = 0.0
    var fahrenheit: Float {
      return (celsius * 1.8) + 32
    }
}

I hope that helps! :)