Adding an int value to a vector using recursion

I have a 1-dimensional vector function. Tried inputting elements using recursion.

++
#include<vector>
    #include<iostream>
    
    using namespace std;
    int input(vector <int> &arr);
    
    int input(vector <int>& arr)
    {
        int n{0};
        char condition{'Y'};
        cout<<"Do you wan to add an element to the dataset?(Y/N): " << endl;
        cin >> condition;
        if(condition== 'Y' || condition=='y')
        {
            cout<<"Enter the element you want to add: " ;
            int temp{};
            cin>>temp;
            arr.push_back(temp);
            return input;
    
        }
        

}

Errors i get: return value does not match function type.

tysm for reading this <3 idfk what i'm doing :(*