invalid operands to binary expression | C++

C++ troubleshoot

Case: vector iterator

class Sample{
public:
    void sample(vector<int>& nums){
        auto i = nums.begin();
        cout << i; //error here
        
    }
};

i is iterator here so changed it to *i

class Sample{
public:
    void sample(vector<int>& nums){
        auto i = nums.begin();
        cout << *i; //works
        
    }
};