Click Specify to define the
Boolean calculation. In the Specify Calculation dialog box, type the calculation you want evaluated, or use the field list (on the left) and the functions list (on the right) with the mathematical and text
operators to build the calculation.
If the calculation result is any number except zero, the calculation evaluates to True and the subsequent script steps are executed. If the calculation result is zero, no data, or does not resolve into a number, then the calculation evaluates to False and the subsequent script steps are not executed.
Every If step must have a corresponding End If script step somewhere after the If step and at the same indentation. Whenever you use an If script step, the Manage Scripts feature automatically enters an End If step.