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

# Reserved words

The following reserved words can't be used in CRMScript as variables, structs, or function names:

* Bool
* break
* catch
* Category
* Company
* continue
* Customer
* Date
* Diary
* else
* Email
* false
* Float
* for
* Generic
* if
* Inbox
* Integer
* Invoice
* License
* Message
* Priority
* return
* String
* struct
* this
* throw
* Ticket
* Time
* true
* try
* User
* Void
* while

You should also avoid using:

* the name of HTML objects and event handlers
* the name of built-in CRMScript classes and functions (can't be redefined or used by you)

## Future compatibility

Avoid all standard programming language reserved words.
This can save you from having to re-write your code as CRMScript evolves.


## Related topics

- [Code structure (syntax)](/en/automation/crmscript/fundamentals/syntax.md)
- [Fundamentals of CRMScript](/en/automation/crmscript/fundamentals/index.md)
- [Variables](/en/automation/crmscript/fundamentals/variables.md)
- [Functions](/en/automation/crmscript/fundamentals/functions.md)
- [CRMScript coding conventions](/en/automation/crmscript/code-quality/coding-conventions.md)
- [word_relations table](/en/database/tables/word-relations.md)