Hello! I was following a tutorial on YouTube from a guy called 'Thenewboston'. I finished his tutorials about a week ago and thought I knew all I needed to know about C++. But the other day I saw on the SFML website (I want to get into game development using SFML and OpenGL and C++) the were talking about signed and unsigned. What does this mean? Should 'Thenewboston' have covered it? It is a fundamental part of C++? Thanks for any help at all!