PDF Check Box Field Math
Using check boxes in math calculations
In Create a PDF Check Box Scoring Questionnaire in Five Minutes I outlined basic math addition from a series of check box fields by using numbers as their export values and also using Right-click > create multiple copies to create the fields with numbered suffixes in the names (Checkbox.0, Checkbox.1, Checkbox.2, etc.) This technique allows the selection of only one field (Checkbox in this example) in Value is the sum of in the calculation tab of a text field. While the value of an unchecked check box field is "Off", "Off" is treated as zero when you use the Value is the sum of in the calculation tab of the field properties.
Get the course above, and a suite of automation tools for FREE with a Professional subscription.
Mutual Excusive Check Boxes Using Number Export Values
Sometimes a form is designed with a series of radio buttons or mutually exclusive check boxes so the end user can select a product or feature, and its price will be used in another calculation. Once a radio button in a series is checked all the buttons in the series can’t be unchecked, so check boxes need to be used instead if this functionality is required.
A series of mutually exclusive check boxes will have the same name and different export values. If two or more in the series have the exact same export values, they will both be checked if either one is checked and they will both be unchecked if either one is unchecked. This causes an issue if more than one in the series have same price, or number, which requires the same export value for the math to work properly.