Allow Null in Build Datatable activity is inconsistent

Hi Guys,
I am trying Build Datatable activity and changing the properties of diff columns in it to see how things work. but i find the ‘Allow Null’ inconsistent. has anyone experienced it…
for example i have created only 2 columns in datatable- elmpoyee name(string) and emplyee salary(int32). i set “allow null” as blank in employee name, meaning it shouldnt be blank/empty, yet when i add rows and leave this field blank , it accepts it.

please advise

Hi @Rani1978 allow null here means it will add row even if it is empty or blank.If you uncheck allow null property it will give u error if the value is empty.