sum of even numbers from 1 to n

#include <iostream>
using namespace std;

int main()
{
    cout << "Program to calculate the sum from of even numbers from 1 to n\n";
    cout << "-------------------------------------------------------------\n";
    cout << "Enter n: ";
    int n;
    cin >> n;
    int ans = 0;
    for (int i = 2; i <= n; i += 2)
    {
        ans += i;
    }
    cout << "The sum of even numbers from 1 to " << n << " is: " << ans << '\n';
    return 0;
}