for each loop syntax in c++ code example

Example 1: for each c++

template<class InputIterator, class Function>
  Function for_each(InputIterator first, InputIterator last, Function fn)
{
  while (first!=last) {
    fn (*first);
    ++first;
  }
  return fn;      // or, since C++11: return move(fn);
}

Example 2: for each loop in c++

#include <iostream> 
using namespace std
int main() 
{ 
    int arr[] = { 10, 20, 30, 40 }; 
  
    // Printing elements of an array using 
    // foreach loop 
    for (int x : arr) 
        cout << x << endl; 
}