Element in c:

Every language has some basic element and there  own rule.c language has also some elements so before starting c language ,we know about the elements of c language.the basic elements of c language are character set, variable ,data type,keyword(reserve word), expression,variable declaration,statement etc.

character set used in c is given below:

1)Alphabets: 

As you know English grammar has 26 alphabets as same we use 26 alphabets in c language but c is case sensitive language ,so A----Z alphabets are different with a---z alphabets.

2)Digits:

digits are basically 0,1,2,3,4,5,6,7,8,9

3)special character:

special character are +, - , < , > , * , & , ^ , % , # , $ ,@, etc.

variable:

variable are the name of the memory location where we store the data.

for example  int a;

where a is the name of the memory location where we store data

if int a=5;

then, 

                                                                                                                                                                                              where we can see ,that a is the memory location name where store data,here our data is 5.
                                         

 Data type:

With the help of data type we declare the variable. data type determine the type and size of the data.

there are 5 keyword called data type in c language.

1)int (store 2 byte data in 16 bit architecture)

2)char(store 1 byte data in 16 bit architecture)

3)float(store 4 byte data in 16 bit architecture)

4)double(store 8 byte data in 16 bit architecture)

5)void

There are two type of data type in c language.

1)primitive data type

2)non primitive data type

primitive data type:

primitive data type is predefined data type.it is predefined in c library .

like int,char,float ,double.

Non primitive data type :

Non primitive data type is user define data type ,this data type defines by user itself

with  the help of structure,union etc. 

Keyword (reserved word):

keyword are predefined word this is also known as reserved word .

in these reserved word 5 word are data type.

there are 32 keyword in c language

These are the 32 keywords are given in the figure                                                                            we are discussing about variable declaration and statement in next chapter.