* Component of 'c' language

1 character set

2 Data type 

3 Constant

4 Variable 

5 Keywords 

6 Grammar (syntax and semantic)

1 Character set :- All symbols used to write in c language.they are :- 

a. Letter  (a-z,A-Z)

B.Digits  (0-9)

C.symbol  (*,&,+,-)

D.White space :-Black space, horizontal tab,carriage return, new line etc....

2 Data type :-Datatype is defining and attributes to the variable.It defining the set of legal that the variable can store.the basic data type int,char,float,etc.....