You can use the following basic operators in your fields' display text or in the values of your skip or validation logic.
Operator | Description |
---|---|
+ | Adds two values or expressions together. |
- | Subtracts one value or expression from another. |
* | Multiplies two values or expressions together. |
/ | Divides one value or expression by another. |
mod | Finds the remainder after division of one expression by another. |
| | Performs a union on two expressions. |
and | Performs a boolean AND on two expressions. |
or | Performs a boolean OR on two expressions. |
= | Performs an 'equals to' comparison on two expressions. |
!= | Performs a 'not equals to' comparison on two expressions. |
<= | Performs a 'less than or equals to' comparison on two expressions. |
< | Performs a 'less than' comparison on two expressions. |
>= | Performs a 'greater than or equals to' comparison on two expressions. |
> | Performs 'greater than' comparison on two expressions. |
Tip: if your calculation does not seem to work correctly, try adding white space around the operator, e.g. instead of "=($field_1+5)" use "=($field_1 + 5)"
Also see here for more functions and expressions you can use.