What is the << operator for in C++?

Question

I come from a C# and Java background into C++ and I\'m trying to get to understand the >> & << operators such as in

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Answer 1

As far as I remember, c++ has streams
<< is an operator that is an operator that is used to "append data" to a stream
And >> is used to extract data from a stream.
Of course, you can implement this with classes which are not just streams.