I don't underatand myVariable...

Answer 1

its simply an example of a variable. myVariable = "Andre". :)

Answer 2

A variable can be named anything. myVariable is a generic name for a variable.

Answer 3

You have to define it. So if i were to say
Int x = 42;
cout << x << endl;
It would output 42

Answer 4

I don't understand your question.