Relational
Arithmetic Logical (numeric and string)
-------------------- ------------------ ---------------------
+ addition & and > greater than
- subtraction | or < less than
* multiplication ! not >= > or equal
/ division ~ not <= < or equal
^ power == equal
- negation != not equal
+ string concatenation ~= not equal
A double equal sign (==) is used for equality testing.
The order of evaluation (from first to last) of all operators is ! (or ~), ^, - (negation), /,
*, - (subtraction), +, != (or ~=), >, <, <=, >=, ==, &, and |.
