## Update - [Relational Patterns][5] added in C#9

> In a relational pattern, you can use any of the [relational operators][7] `<`, `>`, `<=`, or `>=`.  
The right-hand part of a relational pattern must be a constant expression

Here's an example using ranges in a switch expression ([Demo in .NET Fiddle][6]):

```cs
var season = DateTime.Today.Month switch
{
    >= 3 and < 6 => "spring",
    >= 6 and < 9 => "summer",
    >= 9 and < 12 => "autumn",
    12 or (>= 1 and < 3) => "winter",
    _ => ""
};
```

## Further Reading

* [SO - Multiple cases in switch statement][1]
* [SO - Switch case: can I use a range instead of a one number][2]
* [Docs - selection statements > switch][3]
* [Docs - switch expression][4]
* [Docs - patterns > relational pattern][5]

[1]: https://stackoverflow.com/q/68578/1366033
[2]: https://stackoverflow.com/q/20147879/1366033
[3]: https://learn.microsoft.com/en-us/dotnet/csharp/language-reference/statements/selection-statements#the-switch-statement
[4]: https://learn.microsoft.com/en-us/dotnet/csharp/language-reference/operators/switch-expression
[5]: https://learn.microsoft.com/en-us/dotnet/csharp/language-reference/operators/patterns#relational-patterns
[6]: https://dotnetfiddle.net/PDiEu9
[7]: https://learn.microsoft.com/en-us/dotnet/csharp/language-reference/operators/comparison-operators

I'm trying to map a certain wind speed (measured in meters per second) to the appropriate label, taken from http://www.windfinder.com/wind/windspeed.htm. For this, I'd like to use `switch statements`, however I'm not sure how to do this in `C#`.

In `ActionScript`, it was possible using switch blocks, I've also seen it in `Clang`.

    // ActionScript 3
    switch(true) {
        case: mps >= 0 && <= 0.2
            return WindSpeedLabel.Calm; break;
        ...
        case else:
            WindSpeedLabel.ShitHittingTheFan;
    }

    // Clang
    switch(mps) {
        case 0 ... 0.2:
            return WindSpeedLabel.Calm;
        ...

I'm aware it's possible using `if/else statements`, however with about 13 different ranges, I would appreciate a more readable solution.