0 return 
1 assignment
2 constant string,int
3 reserved key data type
4 arithmetic
5 precedence and binop mathematical operation
6 logic operator
7 if and relational ==
8 comparision
9 urnary minus
10 struct
11 for
12 function call
13 passing data types to functions
14 postfix increment and decrement
15 recursion
16 element selection by reference
17 relational !=
18 assignment by sum,difference,product,qutotaion and remainder
19 comma
20 []
21
22
23
24
25
26
27
28
29
30
