---
layout: documentation
title: Rules Blockly - Logging
---
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# Logging

[return to Blockly Reference](index.html#logging)

## Introduction

This section explains the blocks that have been added to allow logging.

[[toc]]

## Logging and Output

These blocks enable arbitrary content to be published to the [openHAB log](https://www.openhab.org/docs/administration/logging.html).

![logging-overview](../images/blockly/blockly-logging-overview.png)

More about that topic can be viewed at ![youtube](../images/blockly/youtube-logo-small.png) [Logging](https://youtu.be/EdllUlJ7p6k?t=670)

### Log Statement

![log-statement](../images/blockly/blockly-logging-log.png)

_Function:_ Sends an entry to the openHAB log file with a defined severity level.

- A [severity level](https://www.openhab.org/docs/administration/logging.html#defining-what-to-log) can be provided via the dropdown list for the log statement

  - error
  - warn
  - info
  - debug
  - trace

Since 3.3: The block attached to the log-block is not restricted to a string type block anymore

### Print Statement

![print-to-stdout](../images/blockly/blockly-logging-print.png)

_Function:_ creates a print statement with the given text in the rule that logs to _stdout_

## Return to Blockly Reference

[return to Blockly Reference](index.html#logging)