Keywords are the words whose meaning has already been explained
to the java compiler. The keywords cannot be used as variable names because if we do
so we are trying to assign a new meaning to the keyword, which is not allowed by the computer. Some Java compilers allow you to construct variable names that exactly
resemble the keywords. However, it would be safer not to mix up the variable names
and the keywords. The keywords are also called 'Reserved words'.
auto int struct break else long switch case enum register typedef char extern
return union const float short unsigned continue for signed void default goto sizeof
volatile do if static while double
Here all above keyword is special keyword, whose definition is already define to the Java compiler and explanation of keyword given in next chapter.