To print following series 1 3 9 27 81....n

Source Code
 
#include <iostream>

using namespace std;

void main ()

{

       int i=1;

       int ans=1;

       int upperlimit;

       cout<<"Please enter the uper limit :";

       cin>>upperlimit;

       while (i<=2 && ans<=upperlimit) // infinite loop and a conditional loop

       {

             cout<<ans<<"\t";

             ans=ans*3;

      

       }

}