back() in c++

                                    // my linkedin : https://www.linkedin.com/in/vaalarivan-prasanna-3a07bb203/
vector<int> vec = {1, 2, 5, 6};
int ele = vec.back();  //ele = 6
//back() method does delete the last element from the vector, it just returns\n
//the last element.

                                    #include <iostream>
#include <vector>

int main()
{
  std::vector<int> myvector;
  
  //add 2 to the back
  myvector.push_back(2);
  
  std::cout << myvector.back() << std::endl; //this will print 2
  
  myvector.push_back(46);
  std::cout << myvector.back() << std::endl; //prints 46
  
  return 0;
  
}

/*Output
2
46
*/

                                    // string::back
#include <iostream>
#include <string>

int main ()
{
  std::string str ("hello world.");
  str.back() = '!';
  std::cout << str << '\n';
  return 0;
}