From cppreference.com
reverse_iteratorrbegin(); (1)(noexcept since C++11)
(constexpr since C++20)const_reverse_iteratorrbegin()const; (2)(noexcept since C++11)
(constexpr since C++20)const_reverse_iteratorcrbegin()constnoexcept; (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
Run this code
#include<algorithm>#include<iostream>#include<iterator>#include<string>intmain(){std::strings("Exemplar!");*s.rbegin()='y';std::cout<<s<<'\n';// "Exemplary"std::stringc;std::copy(s.crbegin(),s.crend(),std::back_inserter(c));std::cout<<c<<'\n';// "yralpmexE"}Output:
Exemplary yralpmexE See also
(C++11)
returns a reverse iterator to the end
(public member function)
returns a reverse iterator to the beginning
(public member function of std::basic_string_view<CharT,Traits>)