# numberFormat issue

**URL:** <https://forum.inductiveautomation.com/t/numberformat-issue/116646>\
**Category:** Ignition\
**Tags:** perspective\
**Created:** [August 4, 2026, 10:22am UTC](https://forum.inductiveautomation.com/t/numberformat-issue/116646 "2026-08-04T10:22:22Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Henk](https://avatars.discourse-cdn.com/v4/letter/h/b5ac83/32.png) [@Henk](https://forum.inductiveautomation.com/u/Henk)\
**Post date:** [August 4, 2026, 10:22am UTC](https://forum.inductiveautomation.com/t/numberformat-issue/116646/1 "2026-08-04T10:22:22Z")

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Ignition Perspective Version 8.3.3

When using the numberFormat function in an expression, we see that the decimal point changes to a comma in the function result. However, the decimal point is desired. The session locale setting is set to en-US. Does this function use other (OS?) locale settings, and if so, can this be disabled?

Below is the expression used, with the result above it.

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/4/d/4d90d99a1452e28fa4c74d462b9e198781dba409.png)

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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:** [August 4, 2026, 11:15am UTC](https://forum.inductiveautomation.com/t/numberformat-issue/116646/2 "2026-08-04T11:15:54Z")

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Expressions run in the gateway and do not respect session locales. What is the locale of the gateway?

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<div class="post-metadata">

**Author:** ![Henk](https://avatars.discourse-cdn.com/v4/letter/h/b5ac83/32.png) [@Henk](https://forum.inductiveautomation.com/u/Henk)\
**Post date:** [August 4, 2026, 11:45am UTC](https://forum.inductiveautomation.com/t/numberformat-issue/116646/3 "2026-08-04T11:45:46Z")

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Ignition:

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/e/c/ec0eb4c7f2b5d0e4f58de62960f2a0b5a8e1338f.png)

OS:

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/4/6/46fb7fc6f7cdc59e907f8823ba721544457168b9.png)

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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:** [August 4, 2026, 11:47am UTC](https://forum.inductiveautomation.com/t/numberformat-issue/116646/4 "2026-08-04T11:47:47Z")

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English (Netherlands) is the first preferred language. That is probably the cause. (You may need more specific help for MS Windows--I don't support its use in such production tasks.)