C - nested switch statements

It is possible to have a switch as a part of the statement sequence of an outer switch. Even if the case constants of the inner and outer switch contain common values, no conflicts will arise.


The syntax for a nested switch statement is as follows −

switch(ch1) {

   case 'A': 
      printf("This A is part of outer switch" );
      switch(ch2) {
         case 'A':
            printf("This A is part of inner switch" );
         case 'B': /* case code */
   case 'B': /* case code */


#include <stdio.h>
int main () {

   /* local variable definition */
   int a = 100;
   int b = 200;
   switch(a) {
      case 100: 
         printf("This is part of outer switch\n", a );
         switch(b) {
            case 200:
               printf("This is part of inner switch\n", a );
   printf("Exact value of a is : %d\n", a );
   printf("Exact value of b is : %d\n", b );
   return 0;

When the above code is compiled and executed, it produces the following result −

This is part of outer switch
This is part of inner switch
Exact value of a is : 100
Exact value of b is : 200
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