table of contents
std::basic_string::back(3) | C++ Standard Libary | std::basic_string::back(3) |
NAME¶
std::basic_string::back - std::basic_string::back
Synopsis¶
CharT& back(); (since C++11)
(until C++20)
constexpr CharT& back(); (since C++20)
const CharT& back() const; (since C++11)
(until C++20)
constexpr const CharT& back() const; (since C++20)
Returns reference to the last character in the string. The behavior is
undefined if
empty() == true.
Parameters¶
(none)
Return value¶
reference to the last character, equivalent to operator[](size() - 1).
Complexity¶
Constant
Example¶
// Run this code
#include <iostream>
#include <string>
int main()
{
{
std::string s("Exemplary");
char& back = s.back();
back = 's';
std::cout << s << '\n'; // "Exemplars"
}
{
std::string const c("Exemplary");
char const& back = c.back();
std::cout << back << '\n'; // 'y'
}
}
Output:¶
Exemplars
y
See also¶
front accesses the first character
(C++11) (public member function)
back accesses the last character
(C++17) (public member function of
std::basic_string_view<CharT,Traits>)
2022.07.31 | http://cppreference.com |