SharePoint online When date column has date in it or is TRUE update different column with preexisting selection

Question

I'm having trouble figuring out what to do in this specific circumstance.

I have a PowerApps form. In this form I have several fields but there are 2 that I'm trying to build a dependency on. A date column, friendly format and a choice column with only 1 option, the number 8.

What I would like to happen is, while the date column is empty the choice column should also stay empty but whenever a day is selected in the date column no matter what that date is the choice column will update to the choice of 8.

I know this can be done though a calculated column my dilemma is that I don't know the syntax to accomplish this. Additional I know this could also be done with a flow condition/switch but once again I don't know how to set that up correctly.

I could have case statements evaluate each day column I have and have a condition set up where if date == true update item but that would be 10 cases I need to build and 10 conditions. When a date column is empty does that necessarily mean it's false and full means true?

Is there a better/ more streamlined way of doing this?

Answer 1

Use the calculated column to replace the choice column and use the formula Ganesh Sanap provides. It would be the best solution.

Just FYI, if you are to use a flow, you can build an automated flow triggered on When an item is created or modified and use the expression null for empty column value.

Answer 2

You can achieve it using calculated column very easily. use below formula:

=IF(ISBLANK([Date Column Name]), "", "8")