Data validation,force cell to be filed with number if respective cell is not empty
Hi,
How do i make B2 cell force to only filled with numbers if A1 cell is not empty?
in other words i want to force B2 cell to be filled with any number, but only on condition if A1 cell is not empty.
I mean if user type anything in A1 he must have to fill B2 also with number
or I want > no user can fill A1 cell alone but he has to fill B2 also with number
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