WAP C++ to 2+4+6+8+............+n

#include <iostream>

using namespace std;

int main()
{
     int n=0,a=2;
    cout<<"enter the limit";
    cin>>n;
    for(int i=1;i<=n;i++){
     cout<<a;
     a=a+2;
     if(i<n)
     cout<<"+";
    }
    return 0;
}

Output:-

enter the limit 5
2+4+6+8+10