how to erase from string c++ code example

Example 1: remove or erase first and last character of string c++

str.pop_back(); // removes last /back character from str
str.erase(str.begin()); // removes first/front character from str

Example 2: erasing a character from a string in c++

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

int main ()
{
  std::string str ("This is an example sentence.");
  std::cout << str << '\n';
                                           // "This is an example sentence."
  str.erase (10,8);                        //            ^^^^^^^^
  std::cout << str << '\n';
                                           // "This is an sentence."
  str.erase (str.begin()+9);               //           ^
  std::cout << str << '\n';
                                           // "This is a sentence."
  str.erase (str.begin()+5, str.end()-9);  //       ^^^^^
  std::cout << str << '\n';
                                           // "This sentence."
  return 0;
}

Example 3: c++ erase remove

std::vector<int> v = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9};
v.erase(std::remove(v.begin(), v.end(), 5), v.end());
// v will be {0 1 2 3 4 6 7 8 9}