# Beginners question about advanced flow computations

**URL:** <https://community.homey.app/t/beginners-question-about-advanced-flow-computations/130708>\
**Category:** Questions & Help\
**Tags:** homey-pro, advancedflow\
**Created:** [February 15, 2025, 6:29pm UTC](https://community.homey.app/t/beginners-question-about-advanced-flow-computations/130708 "2025-02-15T18:29:38Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Pavaros](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/pavaros/32/128452_2.png) [@Pavaros](https://community.homey.app/u/Pavaros)\
**Post date:** [February 15, 2025, 6:29pm UTC](https://community.homey.app/t/beginners-question-about-advanced-flow-computations/130708/1 "2025-02-15T18:29:38Z")

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I don’t understand how I can simply increment a variable. Any computation sets it to NaN. I understood that has to do with the sequence in which computations take place. But I really don’t understand how I should do it correctly. Please see my example computation and corresponding logging. I would appreciate a solution very much!

 ![incrementing variable](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/f/4/f4faa376d3dbb53442297d2b0285a19027ce8ff5.jpeg)

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**Author:** ![Theo\_de\_Koning](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/theo_de_koning/32/136062_2.png) [@Theo\_de\_Koning](https://community.homey.app/u/Theo_de_Koning)\
**Post date:** [February 15, 2025, 7:08pm UTC](https://community.homey.app/t/beginners-question-about-advanced-flow-computations/130708/2 "2025-02-15T19:08:46Z")

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Try {{ “tag”+ 1 }}

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**Author:** ![Rmb](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/rmb/32/79135_2.png) [@Rmb](https://community.homey.app/u/Rmb)\
**Post date:** [February 15, 2025, 9:01pm UTC](https://community.homey.app/t/beginners-question-about-advanced-flow-computations/130708/3 "2025-02-15T21:01:08Z")

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You have to give it an initial value like 0.

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**Author:** ![Pavaros](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/pavaros/32/128452_2.png) [@Pavaros](https://community.homey.app/u/Pavaros)\
**Post date:** [February 15, 2025, 9:04pm UTC](https://community.homey.app/t/beginners-question-about-advanced-flow-computations/130708/4 "2025-02-15T21:04:11Z")

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Thanks, Theo! Yes that seems to work. Do you know if there is a manual where I can find this kind of information? I haven’t seen anything about those double quotes…

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**Author:** ![Wim\_Post](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/wim_post/32/56793_2.png) [@Wim\_Post](https://community.homey.app/u/Wim_Post)\
**Post date:** [February 15, 2025, 9:17pm UTC](https://community.homey.app/t/beginners-question-about-advanced-flow-computations/130708/5 "2025-02-15T21:17:54Z")

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> [@Pavaros](#):
>
> I haven’t seen anything about those double quotes…

 ![IMG_1889](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/6/4/64479616071ba28db3044f95b689ef7d265114fc.jpeg)

This information is ‘hidden’ under the I- button.