> For the complete documentation index, see [llms.txt](https://docs.pentaho.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.pentaho.com/pdia-data-integration/10.2-data-integration/pdi-transformation-steps-reference-overview/calculator/troubleshooting-the-calculator-step/round-a-b-function.md).

# Rounding method for the Round (A, B) function

Starting in Pentaho 6.0, the **Round (A, B)** function rounds to the nearest positive infinity number. This rounding method is known as Round half to ceiling. Before version 6.0, **Round (A, B)** used the Round half to even method, also called unbiased rounding, convergent rounding, statistician's rounding, German mathematician's rounding, Dutch rounding, Gaussian rounding, odd-even rounding, bankers' rounding, or broken rounding. It is widely used in bookkeeping.

**Note:** The "Round half to even" method is the default rounding mode used in IEEE 754 computing functions and operators.

Perform these steps to override the default "Round half to ceiling" method and use the "Round half to even" method.

1. Stop the Pentaho Server.

   **Note:** See the **Install Pentaho Data Integration and Analytics** document for instructions on stopping and starting the Pentaho Server.
2. Open the `kettle.properties` file in a text editor. By default, the `kettle.properties` file is typically stored in your home directory or the `.pentaho` directory.
3. Edit the file and add the following lines:

   ```
   ROUND_2_MODE=ROUND_HALF_EVEN
   ROUND_2_MODE_BACKWARD_COMPATIBILITY_VALUE=ROUND_HALF_EVEN
   ```
4. When complete, close and save the file.
5. Start the Pentaho Server.


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://docs.pentaho.com/pdia-data-integration/10.2-data-integration/pdi-transformation-steps-reference-overview/calculator/troubleshooting-the-calculator-step/round-a-b-function.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.