Pointer Arithmetic - 3 (CAN BE ASKED IN INTERVIEW) in C++

 #include<iostream>

using namespace std;

int main(){

    // int a = 5;

    int arr[20] = {1,2,3,4,5,6};

    int *ptr1 = arr;//

    int *ptr2 = ptr1 + 3; //4

    cout << *ptr2 << endl; // 4

    cout << *ptr1 << endl; // 1

    cout << ptr2-ptr1 << endl;

    // cout << ptr2 - ptr1 << endl;

    return 0;

}

OUTPUT-

4 1 3