Blank a column if a condition is met

Question

I have a established a custom list with 5 columns for testing.

Title column
Date columns (Date1 & Date2)
Calculated column to count days between the 2 dates (Total)
Calculated column to count how long it was since the first date column was entered (How Long).

What I am trying to accomplish is that when the "Date2" column is filled the "How Long" column will blank out.
Example:

So in this case because there is a date in the "Date2" column I want the "How Long" column to be blank. The current formula for my "How Long" column is simple: =Date1-TEXT(NOW(),"mm/dd/yyyy").
Is it possible to add additional syntax that will blank the "How Long" out when a date is entered into "Date2"?

Chelsea_MSFT · Accepted Answer

You can use the ISBLANK Syntax, as Matiur Rahman provided.
But the formula should be:
=IF(NOT(ISBLANK(Date2)),"",Date1-TEXT(NOW(),"mm/dd/yyyy"))

Ganesh Sanap · Answer

In order to check if the date column is blank or not, you can use ISBLANK function in your formula.
Example:
=IF(ISBLANK([Date Column]), "Date column is blank", "Date column is filled")

So, in your case you need to update your formula like below:
=IF(ISBLANK([Date2]), [Date1]-TEXT(NOW(),"mm/dd/yyyy"), "")

Reference: IS functions - Check for ISBLANK example

Matiur Rahman · Answer

Try this:
=IF(ISBLANK(Date2),"",Date1-TEXT(NOW(),"mm/dd/yyyy"))

Blank a column if a condition is met

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