00-hello-world.cxx

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// In order to use the input/output library, we need to 
// include a header which describes its interface.
#include <iostream>


// Every C++ program starts with a function called main()
// Invoking the executable 
int main()
{
  // std::cout is the output stream of the program.
  // The << operator writes data to it.
  // std::endl outputs an end-of-line symbol.
  std::cout << "Hello World" << std::endl;
}