switch statement in C#, Free online C# Programming Tutorial...

C# supports a number of control statements including break, continue, goto, if, switch, return, and throw. They are more or less similar to their counterparts in C++. The switch statement is, however, significantly different. We will explore this difference in this lesson.

The syntax of the switch statement is given as under:

switch (expression)
{
   case constant-expression:
   statements
   jump statement
   [default:
      statements
      jump statement
   ]
}

Kindly pay attention to the following:

The constant-expression can be an integral or string expression.
Control does not fall through.
Jump statement is required for each block – even in the default block.

If you need fall through behavior, youu could use the C# goto statement, as shown in the following example:

switch(a){
case 2:	
   Console.WriteLine("a>1 and ");
   goto case 1;
case 1:
   Console.WriteLine("a>0");
   break;
default:
   Console.WriteLine("a is not set");
   break;
}

As mentioned earlier, we can also use a string in the switch constant-expression. This is demonstrated with the help of the following example:

void func(string option){ 
   switch (option) 
   { 
   case "label": 
      goto case "jump": 
   case "quit": 
      return; 
   case "jump": 
   case "unwind": 
      throw new Exception(); 
   default: 
      break; 
   } 
}

Next >>> Lesson No. 9: C# Properties