If Else statement is a conditional branching statement used to execute a set of code when the condition is true, otherwise executes the code in the "else" part. This belongs to Control Structures.

   if(expression)
      { Statements }
   else
      { Statements } 

  #include <iostream.h>
  using  namespace std;  
  void main()
  {
    int a=10;
    int b=20;
    if (a>b)
     {  
      cout << "A is greater than B"; 
      }
    else
     { 
      cout << "B is greater than A"; 
     }

   B is greater than A

In the above example the "if" condition is false so the code in the "else" part is executed. This is the if else statement, conditional branching in C++.