How to Do Math Operations in Decision Trees

If you’re using Data Entry Fields or Merge Variables to bring data into your decision tree session, you may want to perform basic math operations on these variables. Zingtree offers a stock webhook option that lets you assign a new variable to the results of an addition, subtraction, multiplication or division operation. Here’s how to set it up:

  1. Edit the node where you want the new variable (the result of the math operation) to be calculated.
  2. Click on Show Advanced Options.
  3. At Send message to app, choose Webhook: Zingtree Math.

  4. In the Message, you’ll need to provide the operation, the two variables or values to calculate, and a variable name for the result. In the example above, we’re assigning a variable named result to the sum of variables a and b. Variables must be enclosed in # characters.

Example Calculations

Here are some message examples:

&op=plus&a=5&b=3&result=c
Sets variable c to 5+3

&op=minus&a=#gross#&b=#expenses#&result=net
Sets variable net to the difference of variables gross and expenses.

&op=times&a=#weeks#&b=7&result=days
Sets variable days = weeks * 7.

&op=div&a=#days#&b=7&result=weeks
Sets variable weeks = days / 7.

 

Operations Reference

You can use the following in the op= parameter:

  • plus
  • minus
  • times
  • div

Demo

The Zingtree Demo gallery has an example. You can try it and examine it.

View Demo

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