set::rbegin() and set::rend() in C++ STL Improve Improve Improve Like Article Like Save Article Save Share Report issue Report set::rbegin() is a built-in function in C++ STL which returns a reverse iterator pointing to the last element in the container. Syntax: reverse_iterator set_name.rbegin() Parameters: The function does not take any parameter. Return value: The function returns a reverse iterator pointing to the last element in the container. Program to demonstrate the set::rbegin() method: Program 1: // CPP program to demonstrate the // set::rbegin() function #include <bits/stdc++.h> using namespace std; int main() { int arr[] = { 14, 12, 15, 11, 10 }; // initializes the set from an array set<int> s(arr, arr + 5); set<int>::reverse_iterator rit; // prints all elements in reverse order for (rit = s.rbegin(); rit != s.rend(); rit++) cout << *rit << " "; cout << "\nThe last element in set is " << *(s.rbegin()); return 0; } Output: 15 14 12 11 10 The last element in set is 15 set::rend() in an inbuilt function in C++ STL which returns a reverse iterator pointing to the theoretical element right before the first element in the set container. Syntax: reverse_iterator set_name.rend() Parameter: The function does not accepts any parameter. Return value: The function returns a reverse iterator pointing to the theoretical element right before the first element in the set container. Below programs illustrate the function: Program 1: // CPP program to demonstrate the // set::rend() function #include <bits/stdc++.h> using namespace std; int main() { int arr[] = { 4, 3, 5, 1, 2 }; // initializes the set from an array set<int> s(arr, arr + 5); set<int>::reverse_iterator rit; // prints all elements in reverse order for (rit = s.rbegin(); rit != s.rend(); rit++) cout << *rit << " "; return 0; } Output: 5 4 3 2 1 Last Updated : 19 Jun, 2018 Like Article Save Article Previous set emplace_hint() function in C++ STL Next set crbegin() and crend() function in C++ STL Share your thoughts in the comments Add Your Comment Please Login to comment...