Switch case in C++

• The control statement that allows us to make a decision from the number of choices is called a switch, or more correctly a switch-case-default.

• The Switch executes the case where a match is found and then all subsequent cases till end, so stop that fall through we use break; statement in each case.

• A switch works with the integral or enumerated types.

Syntax :

switch(expression){
   case value1  :
      statement(s);
      break; //optional
   case value2  :
      statement(s);
      break; //optional
    .....
/* you can have any number of case statements. */
   default : //Optional
      statement(s);
  /* code to be executed if all cases are not matched */
}               

Block Diagram :

Example:

#include<iostream>
using namespace std; 
int main( )
{
 int x ;
 cout<< "MENU\n----------\n1. for Hello\n2. for Bye\n-----------\n";
 cout<< "Enter Your Choice: ";
 cin>>x;
 switch(x) {
  case 1: cout<< "HELLO USER!!\n";
 	  break;
  case 2: cout<< "BYE USER!!\n";
	  break;
  default: cout<<"INVALID!!\n";
 }
 return 0;
}

MENU
-----------
1. for Hello
2. for Bye
-----------
Enter Your Choice: 1
HELLO USER!!

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