Why signed, unsigned char ,wchar_t not included in C++ module, i found it in a book

Question

if it removed let me know, because the book is pretty old 2002 edition

Answer 1

SoloLearn does not teach everything of a language. It teaches the beginnings to get you started. However, most programs have no need to make use of those types so skipping them does not have a huge impact on your ability to write programs.