can an else statement be used in a swtch in c code example

Example 1: switch statement in c

#include <stdio.h>

int main(void)
{
  	int a = 0;
  
    switch(a)
    {
       case 1 :
          statement("a = 1");
          break;

       case 2 :
          printf("a = 2");
          break;

       default :
       	  printf("a is neither 1 or 2");
	      break;
    }
}

Example 2: c switch case

switch (expression) {
    case constant1:
      // statements
      break;

    case constant2:
      // statements
      break;

    default:
      // default statements
}