C++ DataType

C++ Data Types

A data type specifies the type of data that a variable can store such as integer, floating, character etc.
There are 4 types of data types in C++ language.

Types	Data Types
Basic Data Type	int, char, float, double, etc
Derived Data Type	array, pointer, etc
Enumeration Data Type	enum
User Defined Data Type	structure

Basic Built in types

char	for character storage ( 1 byte )
int	for integral number ( 2 bytes )
float	single precision floating point ( 4 bytes )
double	double precision floating point numbers ( 8 bytes )

Other Built in types

bool	Boolean ( True or False )
void	Without any Value
wchar_t	Wide Character

Modifiers

Specifiers modify the meanings of the predefined built-in data types and expand them to a much larger set. There are four data type modifiers in C++, they are :

1. long
2. short
3. signed
4. unsigned

C++ Keywords

A keyword is a reserved word. You cannot use it as a variable name, constant name etc. A list of 32 Keywords in C++ Language which are also available in C language are given below.

auto	break	case	char	const	continue	default	do
double	else	enum	extern	float	for	goto	if
int	long	register	return	short	signed	sizeof	static
struct	switch	typedef	union	unsigned	void	volatile	while

A list of 30 Keywords in C++ Language which are not available in C language are given below.

asm	dynamic_cast	namespace	reinterpret_cast	bool
explicit	new	static_cast	false	catch
operator	template	friend	private	class
this	inline	public	throw	const_cast
delete	mutable	protected	true	try
typeid	typename	using	virtual	wchar_t

Basic types of Variables

Each variable while declaration must be given a datatype, on which the memory assigned to the variable depends. Following are the basic types of variables,

bool	For variable to store boolean values( True or False )
char	For variables to store character types.
int	for variable with integral values
float and double are also types for variables with large and floating point values

Operators in C++

Types of operators

1. Assignment Operator
2. Mathematical Operators
3. Relational Operators
4. Logical Operators
5. Bitwise Operators
6. Shift Operators
7. Unary Operators
8. Ternary Operator
9. Comma Operator