Operators are used to write conditions.
Operator 
Meaning 
Comment 
> 
Greater than 

>= 
Greater than or equal to 

< 
Less than 

<= 
Less than or equal to 

= 
Equal to 

!= 
Not equal to 

! 
Not 

& 
And 

 
Or 

? 
List <parameter> ? "<list name>" 

+ 
Add 
Extended conditions only 
 
Subtract 
Extended conditions only 
* 
Multiply 
Extended conditions only 
/ 
Divide 
Extended conditions only 
 When using only &operators in an expression, all expressions must be true for the entire expression to be true.
Example:
tocountry = "SE" & fromcountry = "SE"
 When using only operators in an expression at least one of the expressions must be true for the entire expression to be true.
Example:
tocountry = "SE"  tocountry = "DK"  tocountry = "FI"  Always use excluding conditions in for example, a price list. Otherwise it is the order that decides.
Example:
cartprice >= 500.0
cartprice < 500.0  Use parentheses to decide in which order expressions should be evaluated to render the expected result.
Example:
weight <=20.0 & tocountry = "SE"  tocountry = "DK"
results in
weight = 40.0 and tocountry=DK is true
weight = 10.0 and tocountry=DK is true
while
weight <=20.0 & (tocountry = "SE"  tocountry = "DK")
results in
weight = 40.0 and tocountry=DK is false
weight = 10.0 and tocountry=DK is true  Instead of creating new parameters or having to write long and complicated expressions you can use ! and != to invert boolean expressions.
Example:
!B2B is true if B2B is false
tocountry != "SE" is true if tocountry is not SE  Use condition lists to evaluate against a large amount of values, for example, zip codes.
Example:
tozipcode ? "zipcodes_in_gbg_sthlm"