C++ keywords are reserved words that have special meaning in the language and cannot be used as variable names, class names, or identifiers. These keywords define the structure of a C++ program, control execution flow, handle data types, support object-oriented programming, and interact directly with the compiler.

Understanding C++ keywords is essential for writing error-free code and mastering the fundamentals of the language. Below is the complete, updated list of all C++ keywords, including core, C++11, C++14, C++17, and C++20 additions.

Complete C++ Keywords List (All 95 Keywords)

1. Core C++ Keywords

asm

auto

bool

break

case

catch

char

class

const

const_cast

continue

default

delete

do

double

dynamic_cast

else

enum

explicit

export

extern

false

float

for

friend

goto

if

inline

int

long

mutable

namespace

new

operator

private

protected

public

register

reinterpret_cast

return

short

signed

sizeof

static

static_cast

struct

switch

template

this

throw

true

try

typedef

typeid

typename

union

unsigned

using

virtual

void

volatile

wchar_t

while

2. C++11 Keywords

alignas

alignof

char16_t

char32_t

constexpr

decltype

noexcept

nullptr

static_assert

thread_local

3. C++14 Keywords

( No new keywords introduced)

4. C++17 Keywords

( No new reserved keywords added, but some expansions like if constexpr)

5. C++20 Keywords

concept

consteval

constinit

co_await

co_return

co_yield

requires

6. Alternative Tokens (Also Reserved in C++)

and

and_eq

bitand

bitor

compl

not

not_eq

or

or_eq

xor

xor_eq

7. Contextual Keywords (Used in specific contexts, not fully reserved)

final

override

Why This List Matters

Knowing these keywords helps new programmers avoid naming conflicts, understand compiler rules, and write clearer, structured, and efficient C++ programs. These keywords form the backbone of data types, control statements, loops, classes, memory management, and modern C++ features.

Conclusion

C++ keywords are the foundation of the language, shaping everything from simple programs to advanced OOP systems. Memorizing and understanding how each keyword works will help you write more reliable code and build a strong foundation for learning advanced C++ concepts.