How do I make it so that i can compile with g++ through the terminal?

Noob here. Moving on from Python to C++ (as per our university's curriculum). I'd like to know how I integrate the G++ compiler into the terminal so i could compile from there, like "g++ -o ". Also, how do I know if I do have, indeed, G++? I installed Code::Blocks and it seems to have included the compiler in the installation, but I don't know where to find it.