Unique entries in a table

I’ve got a table where the kids are entering values in the first column, 4 rows. I want to check to see if their 4 values are unique. Ideas?

Make variables for each one (e.g. n1,n2,n3,n4) and make conditionals:

isUnique = when n1=n2 or n1=n3 or n1=n4 or n2=n3 or n2=n4 or n3=n4 false
otherwise true

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I did not see that function in the CL documentation-- did I just miss it?

Oops-- isUnique just a variable.

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