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Correct C++ chapter 'Hello world'.

• Write a 'Hello world' program

• Know how this course works
• Have written a correct 'hello' program

Write a 'Hello world' program.

You'll start with:

main()
{
  // Your code here
}

The text should literally be Hello world, followed by newline.

• Use (and prefer [1]) std::cout
• Do not use std::endl [2]

• Video how to do this chapter: YouTube, mp4
• C++ Weekly: Episode 102: Learning "Modern C++" - 2: Hello World: Similar video for Visual Studio

• [1] C++ Core Guidelines: SL.io.3: Prefer iostreams for I/O
• [2] C++ Core Guidelines: SL.io.50: Avoid endl