# Working with expressions

All expressions (Input, Var or Output) and constraint statements can be viewed and edited directly in the expression fields, in the expression editor, and in the Expression Builder.

### In this section

* [Accessing the expression editor](https://help.qlik.com/talend/en-US/studio-user-guide/8.0-R2026-09/accessing-expression-editor)
* [Writing code using the Expression Builder](https://help.qlik.com/talend/en-US/studio-user-guide/8.0-R2026-09/writing-code-using-expression-builder)