std::array<T,N>:: empty

Checks if the container has no elements, i.e. whether begin ( ) == end ( ) .

Parameters

(none)

Return value

true if the container is empty, false otherwise.

Complexity

Constant.

Example

#include <array>
#include <iostream>
 
int main()
{
    std::array<int, 4> numbers{3, 1, 4, 1};
    std::array<int, 0> no_numbers;
 
    std::cout << std::boolalpha;
    std::cout << "numbers.empty(): " << numbers.empty() << '\n';
    std::cout << "no_numbers.empty(): " << no_numbers.empty() << '\n';
}

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

See also