multiset rbegin() and rend() function in C++ STL

multiset::rbegin() is a built-in function in C++ STL which returns a reverse iterator pointing to the last element in the multiset container.

Syntax:

reverse_iterator multiset_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.

Below program illustrate the multiset::rbegin() method:

// CPP program to demonstrate the 
// multiset::rbegin() function 
#include <bits/stdc++.h> 
using namespace std; 
int main() 
{ 
  
    int arr[] = { 15, 12, 15, 11, 10, 10 }; 
  
    // initializes the set from an array 
    multiset<int> s(arr, arr + 6); 
  
    multiset<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 multiset is " << *(s.rbegin()); 
  
    return 0; 
} 

Output:

15 15 12 11 10 10 
The last element in multiset is 15

multiset::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 multiset container.

Syntax:

reverse_iterator multiset_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 multiset container.

Below program illustrate the multiset::rend() function:

// CPP program to demonstrate the 
// multiset::rend() function 
#include <bits/stdc++.h> 
using namespace std; 
int main() 
{ 
  
    int arr[] = { 15, 13, 15, 11, 13, 10 }; 
  
    // initializes the set from an array 
    multiset<int> s(arr, arr + 6); 
  
    multiset<int>::reverse_iterator rit; 
  
    // prints all elements in reverse order 
    for (rit = s.rbegin(); rit != s.rend(); rit++) 
        cout << *rit << " "; 
  
    return 0; 
} 

Output:

15 15 13 13 11 10

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