Switch Statement in C#

Question

Does anyone know if it's possible to include a range in a switch statement (and if so, how)?

For example:

switch (x)
{
   case 1:
     //do something
     break;
   case 2..8:
     //do something else
     break;
   default:
     break;
}

The compiler doesn't seem to like this kind of syntax - neither does it like:

case <= 8:

Answer 1

Short answer : no. It would be possible to write all of the cases there but such a range notation is not supported.

I think you have to use if statement here or switch to a language where there is a better support for case descrimination.

Answer 2

If you have so few cases, if would be much preferred.

Answer 3

You could, handle the explicit cases case by case, and if you only have one range, deal with it in the default case.

Answer 4

Longer answer: no, but if its for just a few options you can use fall-through:

switch (x)
{
   case 1:
   case 2:
   case 3:
   case 4:
     //do something else
     break;
   default:
     break;
}

Answer 5

you can do

case 2:
case 3:
case 4:
...
case 8:
 // code here
 break

Answer 6

No, but you can write this, so you at least avoid writing the // do something else part multiple times.

switch (x)
{
   case 1:
     //do something
     break;
   case 2: case 3: case 4: case 5: case 6: case 7: case 8:
     //do something else
     break;
   default:
     break;
}

Answer 7

No, this isn't possible. There are a few ways I've done this in the past:

Fixed coding:

switch (x)
{
   case 1:
     //do something
     break;
   case 2:
   case 3:
   case 4:
   case 5:
   case 6:
   case 7:
   case 8:
     //do something else
     break;
   default:
     break;
}

In combination with an if {} statement:

switch (x)
{
   case 1:
     //do something
     break;
   default:
     if (x <= 8)
     {
        // do something
     }
     else
     {
       // throw exception
     }
     break;
}

Answer 8

You can use case fall through:

switch (x)
{
   case 1:
     //do something
     break;
   case 2:
   case 3:
   case 4:
   case 5:
   case 6:
   case 7:
   case 8:
     //do something else
     break;
   default:
     break;
}

But I'd just use if for this.

Answer 9

Hi,

you can not used any conditional statement is switch case but If you wish to execute same line of code for different option than you can do one thing

switch (i)
            {
                case 0:
                case 1:
                case 2: 
                case 3:
                    //do something here.
                    break;
                default:
                    //do something here.
                    break;
            }

Thanks, Abhishek