This chapter was pretty easy. Mostly about objects and variables.
So what is an attribute? It seems like it is another name for an instance variable. They start with an “at” symbol. I am still not too clear what a symbol is.
I did not pay too much attention to the part on protected methods. I read somewhere that Bjarne Stroustrup, the creator of C++, at one point said the “protected” keyword was a mistake. Ever since then I have not paid much attention to protected.