The data type in C defines the amount of storage allocated to variables ,the values that they can accept ,and the operation that can be performed on those variables
C is rich in data types. The verity of data type allow the programmer to select appropriate data type to satisfy the need of application as well as the needs of different machine.
There are three classes of Data-Type
- Primary Data Type
- Derived Data Type
- User Defined Data Type
Primary Data Types(Fundamental Data Types)
All C compiler support five type of fundamental data type
- Integer int 2,768 to 32,768
- Character char -128 to 127
- Floating Point float 3.4e-38 to 3.4e+38
- Double Precision Floating Point double 1.7e-308 to 1.7e+308
- Void Data Type void(used for function when no value is to be return)
Integer Type
Signed
Unsigned
int
unsigned int
short int
unsigned short int
long int
unsigned long int
Character Type
Signed
Unsigned
signed char
unsigned char
Float Type
float
double
long double
Void Type
void
It doesn’t return any value
Size and Range of Data-Types on a 16-bit machine
Types
Size
Range
char (or signed char)
8
-128 to 127
unsigned char
8
0 to 255
int (or signed int)
16
-32768 to 32767
unsigned int
16
0 to 65536
short int (or signed short int)
8
-128 to 127
unsigned short int
8
0 to 255
long int (or signed long int)
32
-2,147,483,648 to2,147,483,647
unsigned long int
32
0 to 4,294,967,295
float
32
3.4E – 38 to 3.4E + 38
double
64
1.7E – 308 to 1.7E + 308
long
80
3.4E _ 4932 to 1.1E + 4932