array::rbegin() and array::rend() in C++ STL

Difficulty Level : Basic
Last Updated : 30 Oct, 2019

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

Syntax:

array_name.rbegin()

Parameters: The function does not accept any parameter.

Return value: The function returns a reverse iterator pointing to the last element in the container.

Program to demonstrate the array::rbegin() method:

Program 1:

// CPP program to illustrate
// the array::rbegin() function
#include <bits/stdc++.h>
using namespace std;
  
int main()
{
    // array initialisation
    array<int, 5> arr = { 1, 5, 2, 4, 7 };
  
    // prints the last element
    cout << "The last element is " << *(arr.rbegin()) << endl;
  
    // prints all the elements
    cout << "The array elements in reverse order are:\n";
    for (auto it = arr.rbegin(); it != arr.rend(); it++)
        cout << *it << " ";
  
    return 0;
}

Output:

The last element is 7
The array elements in reverse order are:
7 4 2 5 1

array::rend() is a built-in function in C++ STL which returns a reverse iterator pointing to the theoretical element right before the first element in the array container.

Syntax:

array_name.rend()

Parameters: The function does not take any parameter.

Return value: The function returns a reverse iterator pointing to the theoretical element right before the first element in the array container.

Program to demonstrate the array::rend() method:

Program 1:

// CPP program to illustrate
// the array::rend() function
#include <bits/stdc++.h>
using namespace std;
  
int main()
{
    array<int, 5> arr = { 1, 5, 2, 4, 7 };
  
    // prints all the elements
    cout << "The array elements in reverse order are:\n";
    for (auto it = arr.rbegin(); it != arr.rend(); it++)
        cout << *it << " ";
    return 0;
}

Output:

The array elements in reverse order are:
7 4 2 5 1

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