Switch case: can I use a range instead of a one number [duplicate]

Solution 1:

A bit late to the game for this question, but in recent changes introduced in C# 7 (Available by default in Visual Studio 2017/.NET Framework 4.6.2), range-based switching is now possible with the switch statement.

Example:

int i = 63;

switch (i)
{
    case int n when (n >= 100):
        Console.WriteLine($"I am 100 or above: {n}");
        break;

    case int n when (n < 100 && n >= 50 ):
        Console.WriteLine($"I am between 99 and 50: {n}");
        break;

    case int n when (n < 50):
        Console.WriteLine($"I am less than 50: {n}");
        break;
}

Notes:

• The parentheses ( and ) are not required in the when condition, but are used in this example to highlight the comparison(s).
• var may also be used in lieu of int. For example: case var n when n >= 100:.

Solution 2:

Here is a better and elegant solution for your problem statement.

int mynumbercheck = 1000;
// Your number to be checked
var myswitch = new Dictionary <Func<int,bool>, Action>
            { 
             { x => x < 10 ,    () => //Do this!...  },  
             { x => x < 100 ,    () => //Do this!...  },
             { x => x < 1000 ,    () => //Do this!...  },
             { x => x < 10000 ,   () => //Do this!... } ,
             { x => x < 100000 ,  () => //Do this!... },
             { x => x < 1000000 ,  () => //Do this!... } 
            };

Now to call our conditional switch

   myswitch.First(sw => sw.Key(mynumbercheck)).Value();

Alternate for Switch/ifElse