---

title: Math

description: This extension adds custom actions to your care flow for simple mathematical operations.

Math

This extension adds custom actions to your care flow for simple mathematical operations.

Custom Actions

Sum

Calculate the sum of two or more addends.

Subtract

Calculate the difference between two numbers.

Multiply

Multiply a series of numbers to get a final product.

Divide

Divide two numbers.

Generate random number

Generates a random (whole) number that falls between the ranges of two numbers [min, max].

Assign to cohort

Deterministically assign any string value (e.g. patient ID, email, UUID) to a cohort number between 1 and a given number of cohorts. The same input will always produce the same cohort, making this action ideal for A/B testing and patient randomization.

Inputs:

• Input value: Any string used to determine the cohort assignment.
• Number of cohorts: The total number of cohorts to distribute inputs across (must be >= 1).

Output:

• Cohort number: An integer between 1 and the number of cohorts (inclusive).

Note: When the number of cohorts changes, a patient's assigned cohort may change because the underlying hash modulo base changes. This action does not guarantee cohort stability across different values of the number of cohorts.

Calculate date difference

Calculate the difference between two dates where "date left" is the minuend and "date right" the subtrahend.

You can choose the unit in which you would like to see the difference expressed:

1. Seconds: get the number of seconds between the given dates. Fractional seconds are truncated towards zero.
2. Minutes: get the signed number of full (rounded towards 0) minutes between the given dates. Fractional minutes are truncated towards zero.
3. Hours: get the number of hours between the given dates. Fractional hours are truncated towards zero.
4. Days: get the number of full day periods between two dates. Fractional days are truncated towards zero.
5. Weeks: get the number of full weeks between two dates. Fractional weeks are truncated towards zero.
6. Months: get the number of full months between the given dates. Fractional months are truncated towards zero.
7. Years: get the number of full years between the given dates.