What is a switch staement in c#

C# - switch

C# includes another decision-making statement called switch. The switch statement executes the code block depending upon the resulted value of an expression. 

Syntax:

1. switch(expression)
   {
       case <value1>
           // code block
           break;
       case <value2>
           // code block
           break;
       case <valueN>
           // code block
           break;
       default 
           // code block
           break;
   }

As per the syntax above, switch statement contains an expression into brackets. It also includes multiple case labels, where each case represents a particular literal value. The switch cases are seperated by a break keyword which stops the execution of a particular case. Also, the switch can include a default case to execute if no case value satisfies the expression.

Consider the following example of a simple switch statement.

Example: switch

1. int x = 10;
   
   switch (x)
   { 
       case 5:
           Console.WriteLine("Value of x is 5");
           break;
       case 10:
           Console.WriteLine("Value of x is 10");
           break;
       case 15:
           Console.WriteLine("Value of x is 15");
           break;
       default:
           Console.WriteLine("Unknown value");
           break;
   }

The switch statement can include expression or variable of any data type such as string, bool, int, enum, char etc.

Example: switch statement

1. string statementType = "switch";
   
   switch (statementType)
   {
       case "if.else":
           Console.WriteLine("if...else statement");
           break;
       case "ternary":
           Console.WriteLine("Ternary operator");
           break;
       case "switch":
           Console.WriteLine("switch statement");
           break;
   }

Goto in switch:

The switch case can use goto to jump over a different case.

Example: goto in switch case 

1. string statementType = "switch";
   
   switch (statementType)
   {
       case "DecisionMaking":
           Console.Write(" is a decision making statement.");
           break;
       case "if.else":
           Console.Write("if-else");
           break;
       case "ternary":
           Console.Write("Ternary operator");
           break;
       case "switch":
           Console.Write("switch statement");
           goto case "DecisionMaking";
   }