# Programming Fundamentals/Function Examples CSharp

## Temperature

``` // This program asks the user for a Fahrenheit temperature,
// converts the given temperature to Celsius,
// and displays the results.
//
// References:
// https://www.mathsisfun.com/temperature-conversion.html
// https://en.wikibooks.org/wiki/C_Sharp_Programming

using System;

class Temperature
{
public static void Main (string[] args)
{
double fahrenheit;
double celsius;

fahrenheit = GetFahrenheit();
celsius = CalculateCelsius(fahrenheit);
DisplayResult(fahrenheit, celsius);
}

private static double GetFahrenheit()
{
string input;
double fahrenheit;

Console.WriteLine("Enter Fahrenheit temperature:");
fahrenheit = Convert.ToDouble(input);

return fahrenheit;
}

private static double CalculateCelsius(double fahrenheit)
{
double celsius;

celsius = (fahrenheit - 32) * 5 / 9;

return celsius;
}

private static void DisplayResult(double fahrenheit, double celsius)
{
Console.WriteLine(fahrenheit.ToString() + "° Fahrenheit is " +
celsius.ToString() + "° Celsius");
}
}
```

### Output

```Enter Fahrenheit temperature:
100
100° Fahrenheit is 37.7777777777778° Celsius
```