There are 60 keywords currently defined for C++. These are shown in
the table below. Together with the formal C++ syntax, they form the
C++ programming language. As programming languages mature, keywords
are often added or deleted from the language.
Keep in mind that the case of the keywords is significant. C++ is a
case-sensitive language, and it requires that all keywords be in
lowercase. For example, RETURN will not be recognized as the
keyword return.