> ## Documentation Index
> Fetch the complete documentation index at: https://learn.workflow.dog/llms.txt
> Use this file to discover all available pages before exploring further.

# Pi

> Return the mathematical constant π.

The **Pi** action provides the numeric constant π for calculations involving
circles, angles, and periodic formulas.

## Outputs

| Output | Type   | Description                                                          |
| ------ | ------ | -------------------------------------------------------------------- |
| **Pi** | Number | π at JavaScript number precision, approximately `3.141592653589793`. |

For example, multiply **Pi** by a circle's diameter to calculate its
circumference.