C++ Sum of 1 to N by Recursion

#include<iostream>
using namespace std;
int anik(int a)
{
    if(a == 1)
        return 1;
    else
        return a + anik(a-1);
}
int main()
{
    int n;

    cout << "Enter A Number :: ";
    cin >> n;
    cout << endl;

    cout << "Sum of 1 to " << n << " :: " << anik(n) << endl;

    return 0;
}