Data Types

 Data Types

• In the declaration of every variables it is mandatory to specify it data type.

• It is representation of a data

Classification  of data type

Basically three types

1. Primitive 
2. Derived 
3. User-defined 

1.Primitive Data types:-

• It is subdivided into sub data types
•  Data we are storing with the help of the size of the data

1. int
2. char
3. float
4. void

2.Derived datatype:-

1. Array
2. String 
3. Pointer 
4. Functions

3.User-defined :-

1. Stretcher 
2. Union
3. typedef
4. enum

The memory size of the basic data types may change according to 32 or 64-bit operating system.Let's see the basic data types. 

Data Types	Memory Size	Range
char	1 byte	−128 to 127
signed char	1 byte	−128 to 127
unsigned char	1 byte	0 to 255
short	2 byte	−32,768 to 32,767
signed short	2 byte	−32,768 to 32,767
unsigned short	2 byte	0 to 65,535
int	2 byte	−32,768 to 32,767
signed int	2 byte	−32,768 to 32,767
unsigned int	2 byte	0 to 65,535
short int	2 byte	−32,768 to 32,767
signed short int	2 byte	−32,768 to 32,767
unsigned short int	2 byte	0 to 65,535
long int	4 byte	-2,147,483,648 to 2,147,483,647
signed long int	4 byte	-2,147,483,648 to 2,147,483,647
unsigned long int	4 byte	0 to 4,294,967,295
float	4 byte
double	8 byte
long double	10 byte