> For the complete documentation index, see [llms.txt](https://docs.nedyx.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.nedyx.com/version-1.66/nedyx/clearlines-functions/logical-functions.md).

# Logical functions

- [AND](https://docs.nedyx.com/version-1.66/nedyx/clearlines-functions/logical-functions/and.md): Returns true, if all parameters are true, otherwise false.
- [IF](https://docs.nedyx.com/version-1.66/nedyx/clearlines-functions/logical-functions/if.md): Evaluates an expression if a corresponding condition is true.
- [ISEMPTY](https://docs.nedyx.com/version-1.66/nedyx/clearlines-functions/logical-functions/isempty.md): Returns true if a value is of type empty or an empty text (““) , otherwise false.
- [ISUSERACTION](https://docs.nedyx.com/version-1.66/nedyx/clearlines-functions/logical-functions/isuseraction.md): Returns true, if the function is called in a formula of the widget, where the user has performed the current action.
- [LOOP](https://docs.nedyx.com/version-1.66/nedyx/clearlines-functions/logical-functions/loop.md): Executes an expression until a condition is met.
- [NOT](https://docs.nedyx.com/version-1.66/nedyx/clearlines-functions/logical-functions/not.md): Returns true, if the parameter is false, otherwise false.
- [OR](https://docs.nedyx.com/version-1.66/nedyx/clearlines-functions/logical-functions/or.md): Returns true, if at least one of the parameters is true, otherwise false