Data types in C refer to an extensive system used for declaring variables or functions of different types. The type of a variable determines how much space it occupies in storage and how the bit pattern stored is interpreted.
| Types |
Description
|
| Basic Types |
They are arithmetic types and are further classified into: (a) integer types and (b) floating-point types.
|
| Enumerated types |
They are again arithmetic types and they are used to define variables that can only assign certain discrete integer values throughout the program.
|
| The type void |
The type specifier void indicates that no value is available.
|
| Derived types |
They include (a) Pointer types, (b) Array types, (c) Structure types, (d) Union types and (e) Function types.
|
Integer Types
| Type |
Storage size |
Value range
|
| char |
1 byte |
-128 to 127 or 0 to 255
|
| unsigned char |
1 byte |
0 to 255
|
| signed char |
1 byte |
-128 to 127
|
| int |
2 or 4 bytes |
-32,768 to 32,767 or -2,147,483,648 to 2,147,483,647
|
| unsigned int |
2 or 4 bytes |
0 to 65,535 or 0 to 4,294,967,295
|
| short |
2 bytes |
-32,768 to 32,767
|
| unsigned short |
2 bytes |
0 to 65,535
|
| long |
4 bytes |
-2,147,483,648 to 2,147,483,647
|
| unsigned long |
4 bytes |
0 to 4,294,967,295
|
//main.c
#include <stdio.h>
#include <limits.h>
int main()
{
printf("Storage size of int : %d \n", sizeof(int));
return 0;
}