NAME

std::array::rend,std::array::crend - std::array::rend,std::array::crend

Synopsis

reverse_iterator rend() noexcept; (until C++17)
constexpr reverse_iterator rend() noexcept; (since C++17)
const_reverse_iterator rend() const noexcept; (until C++17)
constexpr const_reverse_iterator rend() const noexcept; (since C++17)
const_reverse_iterator crend() const noexcept; (until C++17)
constexpr const_reverse_iterator crend() const noexcept; (since C++17)

Returns a reverse iterator to the element following the last element of the reversed
array. It corresponds to the element preceding the first element of the non-reversed
array. This element acts as a placeholder, attempting to access it results in
undefined behavior.

range-rbegin-rend.svg

Parameters

(none)

Return value

Reverse iterator to the element following the last element.

Complexity

Constant.

Example

// Run this code

#include <algorithm>
#include <array>
#include <iostream>

int main()
{
std::array<int, 11> a {1, 11, 11, 35, 0, 12, 79, 76, 76, 69, 40};

// print elements of array in reverse order using const_reverse_iterator`s
std::for_each(a.crbegin(), a.crend(), [](int e){ std::cout << e << ' '; });
// ^^ ^^
std::cout << '\n';

// modify each element of array using non-const reverse_iterator`s
std::for_each(a.rbegin(), a.rend(), [](int& e){ e += 32; });
// ^ ^ ^

// print elements as chars in reverse order using const_reverse_iterator`s
std::for_each(a.crbegin(), a.crend(), [](char e){ std::cout << e; });
// ^^ ^^ ^^^^
std::cout << '\n';
}

Output:

40 69 76 76 79 12 0 35 11 11 1
Hello, C++!