std::basic_string<CharT,Traits,Allocator>::rbegin, std::basic_string<CharT,Traits,Allocator>::crbegin

reverse_iterator rbegin();	(1)	(noexcept since C++11) (constexpr since C++20)
const_reverse_iterator rbegin() const;	(2)	(noexcept since C++11) (constexpr since C++20)
const_reverse_iterator crbegin() const noexcept;	(3)	(since C++11) (constexpr since C++20)

Returns a reverse iterator to the first character of the reversed string. It corresponds to the last character of the non-reversed string.

Parameters

(none)

Return value

Reverse iterator to the first character.

Complexity

Constant.

Notes

libc++ backports crbegin() to C++98 mode.

Example

#include <algorithm>
#include <iostream>
#include <iterator>
#include <string>

int main()
{
    std::string s("Exemplar!");
    *s.rbegin() = 'y';
    std::cout << s << '\n'; // "Exemplary"
 
    std::string c;
    std::copy(s.crbegin(), s.crend(), std::back_inserter(c));
    std::cout << c << '\n'; // "yralpmexE"
}

Output:

Exemplary
yralpmexE