# Faire une opération mathématique sur une “variable de scène”

**URL:** <https://community.gladysassistant.com/t/faire-une-operation-mathematique-sur-une-variable-de-scene/7030>\
**Category:** Demandes livrées\
**Tags:** feature-core, scene, scene-action\
**Created:** [Mars 7, 2022, 8:44 UTC](https://community.gladysassistant.com/t/faire-une-operation-mathematique-sur-une-variable-de-scene/7030 "2022-03-07T20:44:49Z")\
**Posts on this page:** 1\
**Showing post:** 69

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**Author:** ![pierre-gilles](https://gladys-assistant-community.b-cdn.net/user_avatar/community.gladysassistant.com/pierre-gilles/32/5886_2.png) [@pierre-gilles](https://community.gladysassistant.com/u/pierre-gilles)\
**Post date:** [Mai 4, 2023, 8:52 UTC](https://community.gladysassistant.com/t/faire-une-operation-mathematique-sur-une-variable-de-scene/7030/69 "2023-05-04T08:52:11Z")

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@bertrandda Je ne sais pas si tu avais vu mes feedbacks ? 🙂

> <https://github.com/GladysAssistant/Gladys/pull/1742#pullrequestreview-1405208871>
>
> \### Pull Request check-list
> 
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> 
> \- \[x\] If your changes affects code, did your write the tests?
> \- \[x\] Are tests passing? (\`npm test\` on both front/server)
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> 
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> 
> \### Description of change
> 
> Please provide a description of the change here. It's always best with screenshots, so don't hesitate to add some!
> 
> I added calculation in scene conditions and control device box
> Use string evaluation allow also to use device value in calculation and control device
> 
> !\[image\](https://user-images.githubusercontent.com/18148265/232593703-1a4ee942-d495-42dd-8efa-33e873a7c374.png)

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