Objective C Tutorial - Objective C switch

A switch statement tests a variable for equality against a list of values.

Syntax

The syntax for a switch statement in Objective-C programming language is as follows:

switch(expression){
    case constant-expression  :
       statement(s);
       break; /* optional */
    case constant-expression  :
       statement(s);
       break; /* optional */
    case ...
       ...
       break;
    case ...
       ...
       break;
       
    default : /* Optional */
       statement(s);
}

Example

#import <Foundation/Foundation.h>
 
int main ()
{
   char grade = 'B';

   switch(grade)
   {
   case 'A' :
      NSLog(@"A!\n" );
      break;
   case 'B' :
   case 'C' :
      NSLog(@"B\n" );
      break;
   case 'D' :
      NSLog(@"D\n" );
      break;
   case 'F' :
      NSLog(@"F\n" );
      break;
   default :
      NSLog(@"Invalid grade\n" );
   }
   NSLog(@"Your grade is  %c\n", grade );
 
   return 0;
}

switch statement with number

#import <Foundation/Foundation.h>
 
int main ()
{
  int X = 2;
    switch (X)
    {
        case 1:
            NSLog (@"X = 1");
            break;
        case 2:
            NSLog (@"X = 2");
            break;
        default:
            NSLog (@"Default code");
            break;
    }  
 
   return 0;
}

The code above generates the following result.