Predefined words with particular meanings to the compiler are known as keywords. For example:
int price;
In the above example, price is a variable of type integer, as indicated by the keyword int.
List of keywords used in c++ as we know C++ is a very case-sensitive language and all the keywords should be written in lowercase.
| alignas | decltype | namespace | struct |
| alignof | default | new | switch |
| and | delete | noexcept | template |
| and_eq | do | not | this |
| asm | double | not_eq | thread_local |
| auto | dynamic_cast | nullptr | throw |
| bitand | else | operator | true |
| bitor | enum | or | try |
| bool | explicit | or_eq | typedef |
| break | export | private | typeid |
| case | extern | protected | typename |
| catch | false | public | union |
| char | float | register | unsigned |
| char16_t | for | reinterpret_cast | using |
| char32_t | friend | return | virtual |
| class | goto | short | void |
| compl | if | signed | volatile |
| const | inline | sizeof | wchar_t |
| constexpr | int | static | while |
| const_cast | long | static_assert | xor |
| continue | mutable | static_cast | xor_eq |
Any name used to identify a variable, function, class, module, or another user-defined item is referred to as a C++ identifier. A letter from A to Z, a to Z, or an underscore (_) is used as the first character in an identification. One or more letter underscores, or numbers are then added (0 to 9).
The punctuation letters @, $, and percent are not permitted in identifiers in C++. C++ is also known as a case-sensitive programming language Consequently, in C++, Manpower and manpower are two separate identifiers.
An example of acceptable identifiers
ahmd ayan xyz move_name a_789
