Data types in C

A data type for a   variable determines what kind of data can be stored in the variable and how much amount of memory that should be allocated to the variable data types can be categorized in to 3 types.`  

1.     Basic data type

2.     Derived data type

3.     User defined data type basic

Basic Data Types:

The data types which are defined already such data types are called predefined data types .it is also called as Fundamental Data types or Basic Types.

Generally they are categorized into four Types

1.     Integer

2.     Float

3.     Double

4.     Character          

Derived Data Types:

  The data types which are constructed from the Fundamental Types is Called Derived Types.

And these are also called as Secondary data types. These are as follows.

     Array:

         Array is a collection of similar (Homogeneous) data elements which are stored in                                                                                                                                                                                                                                     sequential memory locations’ and all are referred by a common name.

   Strings: Collection of characters enclosed in double quote (““) and ended with null character (‘\0’)

   Pointer: pointer is a variable which        holds the address of another variable i.e. it refers another memory location

Note: The derived data types may be used for representing a single value or multiple values

User Defined Data Types:

The data types which are defined by user with help of Standard Data Types is Called User Defined Data Types

1.     Structures

2.     Unions

3.     Enumerations