if-else-ladder-in-c++

Useful for if-else kind of conditional execution when we have more than two related conditional statements.

Syntax :

if(boolean_expression 1) {
   // Executes when the boolean expression 1 is true
}else if( boolean_expression 2) {
   // Executes when the boolean expression 2 is true
}else if( boolean_expression 3) {
   // Executes when the boolean expression 3 is true
} else  {
   // executes when the none of the above condition is true.
}               

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;
 if(x==1) {
  cout<< "HELLO USER!!\n";
 }
 else if(x==2) {
   cout<< "BYE USER!!\n";
 }
 else {
   cout<< "INVALID CHOICE\n";
 }
 return 0;
}

   MENU
-----------
1. for Hello
2. for Bye
-----------
Enter Your Choice: 3
INVALID CHOICE

Next topic is Nested-If in C++