Keyword | Meaning
--- | ---
asm| To declare that a block of code is to be passed to the assembler.
auto| A storage class specifier that is used to define objects in a block.
break| Terminates a switch statement or a loop.
case| Used specifically within a switch statement to specify a match for the statement’s expression.
catch| Specifies actions taken when an exception occurs.
char| Fundamental data type that defines character objects.
class| To declare a user-defined type that encapsulates data members and operations or member functions.
const| To define objects whose value will not alter throughout the lifetime of program execution.
constexpr| The constexpr specifier declares that it is possible to evaluate the value of the function or variable at compile time.
continue| Transfers control to the start of a loop.
decltype | Used to query the type of an expression.
default| Handles expression values in a switch statement that are not handled by case.
delete| Memory deallocation operator.
do| indicate the start of a do-while statement in which the sub-statement is executed repeatedly until the value of the expression is logical-false.
double| Fundamental data type used to define a floating-point number.
else| Used specifically in an if-else statement.
enum| To declare a user-defined enumeration data type.
extern| An identifier specified as extern has external linkage to the block.
explicit | Used to mark constructors to not implicitly convert types in C++.
float| Fundamental data type used to define a floating-point number.
for| Indicates the start of a statement to achieve repetitive control.
friend| A class or operation whose implementation can access the private data members of a class.
goto| Transfer control to a specified label.
if| Indicate the start of an if statement to achieve selective control.
inline| A function specifier that indicates to the compiler that inline substitution of the function body is to be preferred to the usual function call implementation.
int| Fundamental data type used to define integer objects.
long| A data type modifier that defines a 32-bit int or an extended double.
new| Memory allocation operator.
operator| Overloads a c++ operator with a new declaration.
private| Declares class members which are not visible outside the class.
protected| Declares class members which are private except to derived classes
public| Declares class members who are visible outside the class.
register| A storage class specifier that is an auto specifier, but which also indicates to the compiler that an object will be frequently used and should therefore be kept in a register.
return| Returns an object to a function’s caller.
short| A data type modifier that defines a 16-bit int number.
signed| A data type modifier that indicates an object’s sign is to be stored in the high-order bit.
sizeof| Returns the size of an object in bytes.
static| The lifetime of an object-defined static exists throughout the lifetime of program execution.
struct| To declare new types that encapsulate both data and member functions.
switch| This keyword used in the “Switch statement”.
template| parameterized or generic type.
this| A class pointer points to an object or instance of the class.
throw| Generate an exception.
try| Indicates the start of a block of exception handlers.
typedef| Synonym for another integral or user-defined type.
typename| In template definitions, provides a hint to the compiler that an unknown identifier is a type. In template parameter lists, is used to specify a type parameter.
union| Similar to a structure, struct, in that it can hold different types of data, but a union can hold only one of its members at a given time.
unsigned| A data type modifier that indicates the high-order bit is to be used for an object.
virtual| A function specifier that declares a member function of a class that will be redefined by a derived class.
void| Absent of a type or function parameter list.
volatile| Define an object which may vary in value in a way that is undetectable to the compiler.
while| Start of a while statement and end of a do-while statement.
Some identifiers are reserved for use by C++ implementations and shall not be used otherwise; no diagnostic is required.
* Each identifier that contains a double underscore __ or begins with an underscore followed by an uppercase letter is reserved to the implementation for any use.
* Each identifier that begins with an underscore is reserved to the implementation for use as a name in the global namespace.