New posts in Latex Base

Is it really bad to use \makeatletter and \makeatother in a package or class file?

Understanding \@ifnextchar

What does the command \@dblarg do in a class?

What does \z@ do?

Understanding a \@for loop

What is the exact purpose of \ftype@<TYPE>?

Where can I find help files or documentation for commands like \@startsection for LaTeX?