The C++ function std::unordered_map::end() returns an iterator which points to past-the-end element in the unordered_map.
Following is the declaration for std::unordered_map::end() function form std::unordered_map header.
iterator end() noexcept; const_iterator end() const noexcept;
None
If object is constant qualified then method returns constant iterator otherwise non-constant iterator.
This member function never throw exception.
Constant i.e. O(1)
The following example shows the usage of std::unordered_map::end() function.
#include <iostream> #include <unordered_map> using namespace std; int main(void) { unordered_map<char, int> um = { {'a', 1}, {'b', 2}, {'c', 3}, {'d', 4}, {'e', 5} }; cout << "Unordered map contains following elements" << endl; for (auto it = um.begin(); it != um.end(); ++it) cout << it->first << " = " << it->second << endl; return 0; }
Let us compile and run the above program, this will produce the following result −
Unordered map contains following elements e = 5 a = 1 b = 2 c = 3 d = 4