The C Shell recognizes the following operators, in order of precedence.
() - parenthesis - change order of evaluation
- - unary minus/negation
~ - one's complement
! - logical negation
% - remainder
/ - divide
* - multiply
- - subtract
+ - addition
>> - shift right
<< - shift left
> - greater than
< - less than
>= - greater than or equal
<= - less than or equal
!= - not equal to (strings)
== - equal to (strings)
& - bitwise AND
^ - bitwise exclusive OR
| - bitwise inclusive OR
&& - logical AND
|| - logical OR
Ref: 1 2
