Dynamic Allocation in Cpp [Syntax]

#include "iostream"
using namespace std;

int main() {

    int *x = NULL, *y = NULL;

    x = new int[5]; // int x[5]
    y = new int(5); // *y = 5

    for (int i = 0; i < 5; i++) {
        *(x + i) = i;
    }

    for (int i = 0; i < 5; i++) {
        cout << " " << x[i];
    }

    cout << endl;

    delete []x;

    x = NULL;

    cout << *y << " is in " << y << endl;

    delete y;

    y = NULL;

    return 0;
}