std::array<T,N>::empty - cppreference.com (original) (raw)

| constexpr bool empty() const noexcept; | | (since C++11) | | -------------------------------------- | | ------------- |

Checks if the container has no elements.

[edit] Return value

true if the container is empty, false otherwise.

[edit] Complexity

Constant.

[edit] Example

The following code uses empty to check if a std::array contains any elements:

Output:

numbers.empty(): false no_numbers.empty(): true

[edit] See also

| | returns the number of elements (public member function) [edit] | | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | | | checks whether the container is empty (function template) [edit] |