How to Declare an Array in C++?

`int arr[5];`

`int arr[] = {1, 2, 3, 4, 5};`

`int arr[5] = {1, 2, 3, 4, 5};`

`int arr[5] = {};`

`char str[] = “Hello”;`

`double values[3] = {1.1, 2.2, 3.3};`

`std::string names[3] = {“Alice”, “Bob”, “Charlie”};`

`const int size = 10; int arr[size];`

`std::array arr = {1, 2, 3, 4, 5};`

`std::vector arr = {1, 2, 3, 4, 5};`