AREA OF CIRCLE IN C++

#include <iostream>
using namespace std;

int main ()
{

    int r; // IF USE FLOAT VALUE THEN USE float IN THE PLACE int
    int area; // IF USE FLOAT VALUE THEN USE float IN THE PLACE int

//IF YOU WANT YOU ARE NOT TAKING INPUT FROM USER SO YOU DICLARE VARIABLE LIKE int a=25;
    cout<<"PLEASE ENTER RADIUS : ";
    cin>>r; //FOR TAKING INPUT FROM USER

    area = 3.1416 * r * r;

    cout<<"THE AREA OF THE CIRCLE IS : "<<area<<endl;

    return 0;
}

OUTPUT