cout two dimension array c++

#include <iostream>

int main() {
    int arr[3][4] = {
        {1, 2, 3, 4},
        {5, 6, 7, 8},
        {9, 10, 11, 12}
    };

    for (int i = 0; i < 3; i++) {
        for (int j = 0; j < 4; j++) {
            std::cout << arr[i][j] << " ";
        }
        std::cout << std::endl;
    }

    return 0;
}