The Keyword is a predefined or reserved word in the C++ library with a fixed meaning and is used to perform an internal operation. C++ language supports more than 64 key words.
Every Keyword exist in lower case letters. All the 32 keywords in C language are also in C++
auto, asm, bool, break, case, catch, char, class, const, const_cast, continue, default, delete, do, double, dynamic_cast, else, enum, explicit, extern, false, float, for, friend, goto, if, inline, int, long, mutable, new, newspace, operator, protected, private, public, register, reinterpret_cast, return, short, signed, sizeof, static, static_cast, struct, switch, template, this, throw, true, try, typedef, typename, typeid, union, unsigned, using, virtual, void, volatile, wchar_t, while.