switch

The switch statement is a multi-select. An expression is evaluated once and compared to constants. In case of equality, the instructions that come after the constant processed. In switch statements can only ordinal data types (ie, int, long, int, char, etc.) use.

switch(expression)
{
   case constant1:
       statements
   break;
 
   case constant2:
       statements
   break;
 
   case constantn:
       statements
   break;
 
   default:
       statements
} 

#include <stdio.h>
#include <stdlib.h>
 
int main()
{
 int input;
 
    do
    {
        printf( "press 1 or 2 \n" );
        scanf( "%d", &input );
        switch ( input ) 
        {
            case 1:
                printf("case 1 selected\n");
                break;
            case 2:          
                printf("case 2 selected\n");
                break;
            default:            
                printf( "default case!\n" );
                break;
        }
    }
    while(input != 2);
 
return 0;
}

  press 1 or 2 
  1
  case 1 selected
  press 1 or 2 
  2
  case 2 selected