Data Types in C

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
Derived Data Type	array, pointer, structure, union
Enumeration Data Type	enum
Void Data Type	void

Basic Data Types

The basic data types are integer-based and floating-point based. C language supports both signed and unsigned literals.

The memory size of basic data types may change according to 32 or 64 bit operating system.

Let's see the basic data types. It size is given according to 32 bit OS.

Data Types	Memory Size	Range
char	1 byte	−127 to 127
signed char	1 byte	−127 to 127
unsigned char	1 byte	0 to 127
short	2 byte	−32,767 to 32,767
signed short	2 byte	−32,767 to 32,767
unsigned short	2 byte	0 to 32,767
int	2 byte	−32,767 to 32,767
signed int	2 byte	−32,767 to 32,767
unsigned int	2 byte	0 to 32,767
short int	2 byte	−32,767 to 32,767
signed short int	2 byte	−32,767 to 32,767
unsigned short int	2 byte	0 to 32,767
long int	4 byte
signed long int	4 byte
unsigned long int	4 byte
float	4 byte
double	8 byte
long double	10 byte