---
mapped_pages:
  - https://www.elastic.co/guide/en/elasticsearch/painless/current/painless-keywords.html
products:
  - id: painless
---

# Keywords [painless-keywords]

Keywords are reserved tokens for built-in language features.

**Errors**

* If a keyword is used as an [identifier](/reference/scripting-languages/painless/painless-identifiers.md).

**Keywords**

|     |     |     |     |     |
| --- | --- | --- | --- | --- |
| if | else | while | do | for |
| in | continue | break | return | new |
| try | catch | throw | this | instanceof |