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iOS Swift 2.0 Functions Functions in Swift 2.0 Recap: Functions

What is wrong with this code?

func temperatureInFahrenheit(temperature: Double)-> Double {
result = (temperature * 9) / 5
result = result + 32
return result
}

2 Answers

Hi there,

In your code, result isn't declared. Add the word var before its first usage - that will fix your code.

func temperatureInFahrenheit (temperature: Double) -> Double {
  var result = (temperature * 9) / 5
  result = result + 32
  return result
}

Alternatively, try a solution on one line like this:

func temperatureInFahrenheit(temperature: Double) -> Double {
  return ((temperature * 9) / 5) + 32
}

I hope that helps.

Steve.

Steven Deutsch
Steven Deutsch
21,046 Points

Hey Abdijabar Mohamed,

The code challenge asks us to create a function that converts a temperature from Celsius to Fahrenheit. The problem with your code is that you're not declaring result as a variable or a constant. To get your code to pass, you need to declare result as a variable.

func temperatureInFahrenheit(temperature: Double) -> Double {
    var result = (temperature * 9) / 5
    result = result + 32
    return result
}

You can condense the operations of the function to be on a single line, because of the order of operations. Here's the solution I recommend:

func temperatureInFahrenheit(temperature: Double) -> Double {
    let result = (temperature * 9)/5 + 32
    return result
}

Good Luck!

Thanks a heap

Thanks a heap