C++ Token and C++ keywords

In this page, we will discuss,

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Token

small parts of a program, which make complete a program. In simple language, some keywords, alphabet or special character from which we write a Program, some of these names are user-defined and some are already present in the library of C++ are called pre-defined.

Type of token in C++

They are as follows,

• keyword
• identifier
• operator
• constant
• comments
• string

keyword in C++

There are already some reserved keywords in C++, whose definition is already defined, we can use them to perform a task in our program according to our requirement.

There are some reserved keywords in C++ and all the lowercase ones are there. which are as follows,

keyword	Their used
int	used to store only numeric types of value
float	used to store only decimal types of value
char	store characters types of values
void	In a void type function(non-returning function) and also in void pointer
sizeof	to know a data-type size in own system
const	declare a const type variable
enum	To declare an enum data-type
typedef	define an alias name of a data-type
signed	a type-modifier data-type to
unsigned	a type-modifier used with a data-type to change their properties
long	To declare a long type modifier
short	To declare a signed type modifier
if	To define the if statement in the conditional statement
else	To define else body in the condition statement
break	a breaking type statement used to break a statement in the program
switch	To declare a switch statement in the program
case	To define the case statement in the switch-statement
default	define a default statement in the switch-statement
for	To define a for loop in the looping statement
do	To define a “do”  types of loop in the looping statement
while	To define a while loop in the looping statement
continue	used to skip a statement in the program
goto	jump to anywhere in the program / transfer the execution
struct	declare a structure data-type in the Program
union	declaring a union data-type in the Program
return	to return a value in the function
inline	to declaring an inline function
auto	To declaring an auto variable in a Program
static	To declare a static variable and function
register	To declare a register type variable
extern	To declare an extern type variable
new	To allocate dynamic memory in C++
delete	To de-allocate dynamic memory reserved by new,
this	return the current object
class	To declare a class in C++
private	To declare private member in the class
public	To declare public member in the class
protected	To declare protected member in the class
friend	To define a friend function in the class
virtual	To declare a virtual class or function
try	used in the Exception handling
throw	used to throwing a statement to catch statement
catch	Handling an exception/error in the program
operator	used in operator overloading
template
volatile

Apart from this, there are many more keywords in C ++. These keywords are further explained

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