Data types specify how we enter data into our programs and what
type of data we enter. C language has some predefined set of data types to
handle various kinds of data that we use in our program. These data types have
different storage capacities.
C language supports 2 different type of data types,
A. Primary data types:
These are fundamental data types in C namely integer (int),
floating (float), character (char) and void.
B. Derived data types:
Derived data types are like arrays, functions, structures and pointers.
These are discussed in detail later.
A.1 Integer type:
Integers are used to store whole numbers.
Size and range of
Integer type on 16-bit machine
|
Type
|
Size(bytes)
|
Range
|
|
int or signed int
|
2
|
-32,768 to 32767
|
|
unsigned int
|
2
|
0 to 65535
|
|
short int or signed short int
|
1
|
-128 to 127
|
|
long int or signed long int
|
4
|
-2,147,483,648 to 2,147,483,647
|
|
unsigned long int
|
4
|
0 to 4,294,967,295
|
A.2 Floating type:
Floating types are
used to store real numbers.
Size and range of
Integer type on 16-bit machine
|
Type
|
Size(bytes)
|
Range
|
|
Float
|
4
|
3.4E-38 to 3.4E+38
|
|
double
|
8
|
1.7E-308 to 1.7E+308
|
|
long double
|
10
|
3.4E-4932 to 1.1E+4932
|
A.3 Character type:
Character types are
used to store characters value.
Size and range of
Integer type on 16-bit machine
|
Type
|
Size(bytes)
|
Range
|
|
char or signed char
|
1
|
-128 to 127
|
|
unsigned char
|
1
|
0 to 255
|
A.4 Void type:
Void type means no
value. This is usually used to specify the type of functions.
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