Multidimensional arrays

What are multidimensional arrays?
Is the final null character added automatically? char greeting[] = "Hello, "; – when compiling an running the program, I get the impression that this isn’t the case. Or I misunderstood something, I think. is different from \n – that’s it. But what is the null character good for?

What is the reference operator (&)?

What is the dereference operator?

What is an assignment operation? Can you give an example?

What is a pointer?

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