string length in c++ stl code example

Example 1: length of string c++

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

int main ()
{
  std::string str ("Test string");
  std::cout << "The size of str is " << str.length() << " bytes.\n";
  return 0;
}

Example 2: length of a string c++

string str ="hello world"; 
//different ways to find length of a string: 
str.length(); 
str.size();