C # switch statement

One switch statement allows you to test when a variable is equal to multiple values. Each value is called a case and the variable being tested will be for each switch case to check it out.

C # nested switch statement

You can put one switch as an external switch, part of the statement sequence that can be found in a switch, use another within thestatement switch. Even internally and externally switch of case constants contain common values and there is no contradiction.

Grammar

Nesting in C # switch syntax of the statement:

switch(ch1)
{
   case 'A':
      printf("This A is part of the external switch" );
      switch(ch2)
      {
         case 'A':
            printf("This A is part of the internal switch" );
            break;
         case 'B': /* Internal B case code */
      }
      break;
   case 'B': /* External B case code */
}

Example

using System;
namespace DecisionMaking
{

    class Program
    {
        static void Main(string[] args)
        {
            int a = 100;
            int b = 200;
            switch (a)
            {
                case 100:
                    Console.WriteLine("This is part of the external switch");
                    switch (b)
                    {
                        case 200:
                        Console.WriteLine("This is part of the internal switch");
                        break;
                    }
                    break;
            }
            Console.WriteLine("The exact value of a is {0}", a);
            Console.WriteLine("The exact value of b is {0}", b);
            Console.ReadLine();
        }
    }
}

When the above code is compiled and executed, it produces the following results:

This is part of the external switch
This is part of the internal switch
The accurate value of a is 100
The accurate value of b is 200