# Check for Correctness of Square Root Values in Table

**URL:** <https://cl.desmos.com/t/check-for-correctness-of-square-root-values-in-table/2641>\
**Category:** Questions\
**Created:** [February 11, 2021, 3:08am UTC](https://cl.desmos.com/t/check-for-correctness-of-square-root-values-in-table/2641 "2021-02-11T03:08:55Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Katie\_Pence](https://yyz1.discourse-cdn.com/flex031/user_avatar/cl.desmos.com/katie_pence/32/2038_2.png) [@Katie\_Pence](https://cl.desmos.com/u/Katie_Pence)\
**Post date:** [February 11, 2021, 3:08am UTC](https://cl.desmos.com/t/check-for-correctness-of-square-root-values-in-table/2641/1 "2021-02-11T03:08:55Z")

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Hello!

I’m new to the computation layer, so this may already be answered but I can’t find it.

I’m wanting to have a gray checkmark in the dashboard and check for correctness within a table, but the values are square roots. I thought I found a work around in another post, but it’s not working. The correct answer should be sqrt(2)/2 (for plotting points from the unit circle). This is what I’ve tried:

correct:  
(this.cellNumericValue(2,1) = 0 and  
this.cellNumericValue(2,2) \>= 0.707106780 and  
this.cellNumericValue(2,2) \<= 0.707106782)

I’d really appreciate help with this! Thank you!

**UPDATE** After more fiddling, apparently it’s my first line that is the issue…?? With the cell = 0…?? How is this incorrect?

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<div class="post-metadata">

**Author:** ![Daniel\_Grubbs](https://yyz1.discourse-cdn.com/flex031/user_avatar/cl.desmos.com/daniel_grubbs/32/719_2.png) [@Daniel\_Grubbs](https://cl.desmos.com/u/Daniel_Grubbs)\
**Post date:** [February 11, 2021, 4:23am UTC](https://cl.desmos.com/t/check-for-correctness-of-square-root-values-in-table/2641/2 "2021-02-11T04:23:44Z")

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What is in cell (2,1)? Easier to help if you Publish and Share Activity.