Data Type and Keywords in C programming

Today in this blog i will teach you what is data types and Keywords. This post will be very useful for you if you want to become a good programmer because without knowledge  of  data type and keyword you can't be a good programmer.

Let's start

 

What is Data Type ?

1.It is a type of data which is used in the program.
2.There are many predefined data types in c library like int,char,float etc.

Basic Type	Integer Type(int)
	Floating Type(float)
	Character Type(char)
Derived Type	Pointer
	Array
	Structure
	Union

Integer Type

Data Type	Size in bytes	Range
short	2	-32768 to +32767
int	2	-32768 to +32767
unsigned int	2	0 to 65536
long	4	-2147483648 to +2147483647
unsigned long int	4	0 to 4,294,967,295

Float Type

Data Type	Size in 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

Character Type

Data Type	Size in bytes	Range
char	1	-128 to +127
signed char	1	-128 to +127
unsigned char	1	0 to 255

What is Keyword ?

 

1.The word has a predefined meaning is called keywords.

2.It's functionality is also predefined.

3.It can not be used as an identifier.

4.There are 32 keywords are used in c.

List of Keywords

1.default

2.float

3.register

4.struct

5.volatile

6.break

7.do

8.for

9.return

10.switch

11.while

12.case

13.double

14.goto

15.short

16.typedef

17.char

18.else

19.if

20.signed

21.union

22.const

23.enum

24.int

25.sizeof

26.unsigned

27.continue

28.extern

29.long

30.static

31.void

32.auto

 

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