std::basic_string<CharT,Traits,Allocator>::back (3) - Linux Manuals

std::basic_string<CharT,Traits,Allocator>::back: std::basic_string<CharT,Traits,Allocator>::back

NAME

std::basic_string<CharT,Traits,Allocator>::back - std::basic_string<CharT,Traits,Allocator>::back

Synopsis

CharT& back(); (since C++11)
const CharT& back() const; (since C++11)

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