std::stack::empty

From cppreference.com
< cpplrm; | containerlrm; | stack

bool empty() const;
(until C++20)
[[nodiscard]] bool empty() const;
(since C++20)

Checks if the underlying container has no elements, i.e. whether c.empty().

Parameters

(none)

Return value

true if the underlying container is empty, false otherwise

Complexity

Constant

See also

returns the number of elements
(public member function)