int age = 25; int myAge = age; std::cout << "My age is: " << myAge << std::endl;
std::vectornumbers = {1, 2, 3, 4, 5}; int fourthNumber = numbers.at(3); std::cout << "Fourth number is: " << fourthNumber << std::endl;
int numbers[2][3] = {{1, 2, 3}, {4, 5, 6}}; int value = numbers[1][2]; std::cout << "The value at index 1, 2 is: " << value << std::endl;Package library: Standard library.