# Adding a value to a tag

**URL:** <https://forum.inductiveautomation.com/t/adding-a-value-to-a-tag/96558>\
**Category:** Ignition\
**Tags:** ignition79, scripting\
**Created:** [September 27, 2024, 5:15pm UTC](https://forum.inductiveautomation.com/t/adding-a-value-to-a-tag/96558 "2024-09-27T17:15:40Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Kyle\_Metz](https://avatars.discourse-cdn.com/v4/letter/k/8edcca/32.png) [@Kyle\_Metz](https://forum.inductiveautomation.com/u/Kyle_Metz)\
**Post date:** [September 27, 2024, 5:15pm UTC](https://forum.inductiveautomation.com/t/adding-a-value-to-a-tag/96558/1 "2024-09-27T17:15:40Z")

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I feel like this should be easy I'm trying to add 1 plus a tag but the `system.math.sum` feature wasn't until 7.9.8 and I'm using 7.9.1

```python
tag = system.tag.read("Maintenance Schedule/jobNo")
offset = 1

value = [tag, offset]

system.math.sum(value)

```

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<div class="post-metadata">

**Author:** ![Benjamin\_Furlani](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/benjamin_furlani/32/66084_2.png) [@Benjamin\_Furlani](https://forum.inductiveautomation.com/u/Benjamin_Furlani)\
**Post date:** [September 27, 2024, 5:20pm UTC](https://forum.inductiveautomation.com/t/adding-a-value-to-a-tag/96558/2 "2024-09-27T17:20:32Z")

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You already have the value so wouldn't you just tag.value + 1?

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<div class="post-metadata">

**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\
**Post date:** [September 27, 2024, 5:21pm UTC](https://forum.inductiveautomation.com/t/adding-a-value-to-a-tag/96558/3 "2024-09-27T17:21:56Z")

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> [@Benjamin\_Furlani](#):
>
> just tag.value + 1?

This, and you need to actually write back to the tag.

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<div class="post-metadata">

**Author:** ![Kyle\_Metz](https://avatars.discourse-cdn.com/v4/letter/k/8edcca/32.png) [@Kyle\_Metz](https://forum.inductiveautomation.com/u/Kyle_Metz)\
**Post date:** [September 27, 2024, 5:29pm UTC](https://forum.inductiveautomation.com/t/adding-a-value-to-a-tag/96558/4 "2024-09-27T17:29:58Z")

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thank you!! and @Benjamin_Furlani