Calculations and variables

Open the Logic modal in the bottom-right of your form editor.

Click Calculations followed by + New calculation. Here, you’ll be able to add, edit, and delete calculations in your form.

Add your calculation by giving it a Name and Type. The name refers to how you’ll refer to it in-app, whereas the type can either be one of these:

• Number - if you want to compute some numerical result, like a price or a score
• Text - if you want to compute some dynamic text, e.g. some text that depends on a user’s selections in the form.
• Duration - if you want to compute the interval between two dates, e.g. age or term period

Then, provide an Initial value for your calculation.

Every calculation has some value that it starts with, e.g. defining what a variable starts out as. Some common examples:

• 0 - if you want to add to a price variable over time as the respondent picks options
• 100 - if you want to deduct points for wrong answers on a quiz from 100
• Any arbitrary text - for a text calculation (or leaving it empty)

Specify the rules that determine how the calculated value changes.

A rule is made up of 3 main parts:

• Operation - this is what you want to do to your calculation, e.g. Add a number to it
• Operation value - this is the value that interacts with the operation, e.g. Add whatever number you provide
• Condition - this defines when you should perform that operation. This is similar to how you might hide/show a question depending on user input

You can drag and drop conditions using the handle on the right-hand side to reorder them. Rules will take effect in the order that they appear on this screen. For example, you can add 5, and then multiply by 2, instead of doing it vice versa.