We’ve learned about functions and arguments, it's time to meet the callback.
In our example, person number one takes the name of person number two (1) and calls him inside of his task (2). So person number two is a callback function.
Functions are still called functions. But if they are accepted as arguments in other functions, they are also called callback functions. Now you know who is hidden under the name callback. And who is the king. Or think he is.
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