Data Types!

Data Type defines which type of data we are actually using in our C program, for example if you want to make a program, which simply add two numbers ,so the number should contain an integer value or for example: 2,3,4,5,....
The 2,3... like Digits called Integers.
 
We have generally two types of data types:
 

1.Fundamentals

2.Derived

 
Fundamental Data Types are the base of other data types ,most commonly used data types in any C program.They are:

int, float, char

"int" stores only integer values (2,3,4,.....)
"float" stores Decimal values (2.3,3.4,....)
"char" stores character type values (a, b, A, B, ....)

 Storage Requirement for Fundamental Data types in memory:

 

Data	Bytes Consume	Range Min	Range Max
Char	1	-128	127
Int	4	-2^31	(2^31)-1
float	4	6 digit of precision	6 digit of precision

Derived Data Types are the type of data types which are actually modification of Fundamental Data Types:

short int, long int, double float

 Storage Requirements for Derived Data types in memory:

Data	Bytes Consume	Range Min	Range Max
short int	2	-2^15	(2^15)-1
long Int	4	-2^31	(2^31)-1
double float	8	6 digit of precision	12 digit of precision