Multiple Case Switch Statement in C#

1. Create Multiple Case Switch Statement in C#
2. Create Multiple Case Switch Statement With Ranged Cases in C#

This tutorial will introduce methods to create a multiple-case switch statement in C#.

Create Multiple Case Switch Statement in C#

A switch statement is a selection structure that is used to select one particular case from a range of cases based on some conditions. If we have a variable x and we want to display The value is between 1 and 3 when the value of x is 1, 2, or 3, we have to write the conventional switch statement as shown in the code example below.

using System;

namespace multiple_case_switch {
  class Program {
    static void Main(string[] args) {
      int x = 3;
      switch (x) {
        case 1:
        case 2:
        case 3:
          Console.WriteLine("The value is between 1 and 3");
          break;
        case 4:
        case 5:
        case 6:
          Console.WriteLine("The value is between 4 and 6");
          break;
      }
    }
  }
}

Output:

The value is between 1 and 3

In the above code, we created a multiple case switch statement that prints The value is between 1 and 3 for the values of x between 1 and 3 and prints The value is between 4 and 6 if the value of x is between 4 and 6. This approach is alright if there is a small number of case labels. But for a large number of case labels, this method is not recommended because it is very labor-intensive and takes a lot of time.

Create Multiple Case Switch Statement With Ranged Cases in C#

The ranged case labels are used to perform an action for a range of values in C#. We can use the ranged case labels to achieve the same goal as the previous example. The when keyword is used to specify a condition inside the case label to make it a ranged case in C#. The following code example shows us how we can use the ranged case label to create a multiple case switch statement in C#.

using System;

namespace multiple_case_switch {
  class Program {
    static void method2() {}
    static void Main(string[] args) {
      int x = 5;

      switch (x) {
        case int n when (n >= 1 && n >= 3):
          Console.WriteLine("The value is between 1 and 3");
          break;

        case int n when (n >= 4 && n <= 6):
          Console.WriteLine("The value is between 4 and 6");
          break;
      }
    }
  }
}

Output:

The value is between 4 and 6

In the above code, we created a multiple case switch statement that prints The value is between 1 and 3 for the values of x between 1 and 3 and prints The value is between 4 and 6 if the value of x is between 4 and 6. We used the when keyword to specify the condition that our value has to satisfy before executing the case label. This approach is preferred over the previous approach for a large number of case labels because we can specify a large range of values inside a single case label.a