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# help with Recap: functions

Question: Let's add some code to the body of the function. Get rid of the existing return statement that's in there and in this task we're going to write out code to take a Celcius temperature value passed in and convert it to Fahrenheit.

To convert from Celcius to Fahrenheit - multiply the value by 9, divide the resulting value by 5 and then add 32.

Once you have the Fahrenheit value, return it from the function.

functions.swift
```// Enter your code below

func temperatureInFahrenheit (temperature: Double) -> Double {
???
}
```

Hi Sam,

What have you tried so far? I'd prefer not to just give you the answer, since you should be using these coding challenges as an opportunity to learn.

The basic idea is that the function should accept a temperature in C and output one in F. So you would call temperatureInFahrenheit(100), and that would output 212, for example.

100 * 9 / 5 + 32 = 212

What can you write in the function body that will take whatever value for `temperature`, do the math above, and return the result? Try something out and if you have trouble post it here and we can help you figure it out!

Cheers

-Greg