# Ignition core certification Test Question

**URL:** <https://forum.inductiveautomation.com/t/ignition-core-certification-test-question/115955>\
**Category:** Ignition\
**Created:** [June 12, 2026, 3:58am UTC](https://forum.inductiveautomation.com/t/ignition-core-certification-test-question/115955 "2026-06-12T03:58:10Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![amazinglq](https://avatars.discourse-cdn.com/v4/letter/a/5e9695/32.png) [@amazinglq](https://forum.inductiveautomation.com/u/amazinglq)\
**Post date:** [June 12, 2026, 3:58am UTC](https://forum.inductiveautomation.com/t/ignition-core-certification-test-question/115955/1 "2026-06-12T03:58:11Z")

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> **[Practice Test Questions | Inductive Automation Training](https://training.inductiveautomation.com/core-certification/study-guide/practice-test-questions/)**
>
> These are examples of questions like those you will find on the test. This is a self-test, the correct answers are also provided here in this document. There are a varying number of questions in each topic. Read each question carefully and record...

1. why 3.14159265359 is float not double

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**Author:** ![justinedwards.jle](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/justinedwards.jle/32/37854_2.png) [@justinedwards.jle](https://forum.inductiveautomation.com/u/justinedwards.jle)\
**Post date:** [June 12, 2026, 5:32am UTC](https://forum.inductiveautomation.com/t/ignition-core-certification-test-question/115955/2 "2026-06-12T05:32:41Z")

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That's a good question because with that many decimal places, a double would be expected. In the [user manual](https://www.docs.inductiveautomation.com/docs/8.3/platform/tags/tag-data-types), the string value for a double is "Float8," so I'm guessing either answer should be acceptable.

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/6/d/6d28abc61a84add3efc6bb5c6032e38767d5fabb.png)