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Rufaro Makoroni
2,551 PointsComputed properties challenge.
I don't know how to complete this challenge. Please help.
class Temperature {
var celsius: Float = 0.0
var fahrenheit: String {
return (celsius*1.8)+32
}
init (celsius: Float, fahrenheit: String){
self.celsius=celsius
}
}
4 Answers
Kevin Lozandier
Courses Plus Student 53,747 PointsHello again, Jac Wynn & Rufaro Makoroni :
No problems on my end when I use XCode, with the advised changes I recommended earlier today:
// Playground - noun: a place where people can play
import UIKit
class Temperature {
var celsius: Float = 0.0
var fahrenheit: Float {
return (celsius * 1.8) + 32
}
init(celsius: Float){
self.celsius=celsius
}
}
let a : Temperature = Temperature(celsius: 23.0)
println(a.fahrenheit)
Kevin Lozandier
Courses Plus Student 53,747 PointsHi, Rufaro Makoroni:
You have the wrong type associated with your fahrenheit value; it should be a float.
What you have currently the compiler will complain since the return value of the operations based on the operands (* & +) will not change things to return a String; A Float is what you meant to use, I'm assuming?
class Temperature {
var celsius: Float = 0.0
var fahrenheit: Float {
return (celsius*1.8) + 32
}
init (celsius: Float){
self.celsius = celsius
}
}
Rufaro Makoroni
2,551 PointsHi, Kevin Lozandier. I keep getting an error even after writing the code as you have done above.
Kevin Lozandier
Courses Plus Student 53,747 PointsThat's odd; Can you provide me an exact error? I usually code Swift on the latest version of Swift the latest version XCode provides for the sake of debugging; I'm able to use the class as a Swift developer would normally expect.
Rufaro Makoroni
2,551 Pointsfinally got it. Thank you :)
Kevin Lozandier
Courses Plus Student 53,747 PointsAlso note, of course the fahrenheit variable—since it's a computed property—is read-only: Your init will never work as written.
A user of your class cannot edit or initialize a new instance of Temperature with fahrenheit directly—if they were able to, it would defeat the purpose of a computed property being of value towards the property being used accurately in an application.
Jac Wynn
16,850 PointsIm still getting a error with my code and I'm not sure what I have wrong. Could somebody help me out??
class Temperature {
var celsius: Float = 0.0
var fahrenheit: Float {
return celsius * 1.8 + 32
}
init (celsius: Float) {
self.celsius = celsius
}
}
Kevin Lozandier
Courses Plus Student 53,747 PointsEdited your answer to have proper code highlighting: Please surround your code with three, consecutive backticks/grave characters (the character next to the 1 key on most traditional keyboards) with the first set of backticks labeled with the language your code snippet's syntax is adhering to.