std::unordered_set::end, std::unordered_set::cend

From cppreference.com

iterator end() noexcept;
(since C++11)
const_iterator end() const noexcept;
(since C++11)
const_iterator cend() const noexcept;
(since C++11)

Returns an iterator to the element following the last element of the container.

This element acts as a placeholder; attempting to access it results in undefined behavior.

range-begin-end.svg

Parameters

(none)

Return value

Iterator to the element following the last element.

Complexity

Constant.

Notes

Because both iterator and const_iterator are constant iterators (and may in fact be the same type), it is not possible to mutate the elements of the container through an iterator returned by any of these member functions.

See also

returns an iterator to the beginning
(public member function)