CASE equivalent of a nested IIF statement

Question

Can anyone please decode the following nested IIF to a CASE statement in SQL.. I know IIF is allowed in SQL Server 2012 but I find it hard to get an easy grasp of a nested IIF l

Answer 1

I think this is what it boils down to in one CASE expression:

CASE
  WHEN TABLE_A.Col_1 = 0 AND TABLE_A.Col_2 + (2*TABLE_A.Col_3) <= .5 THEN 'A'
  WHEN TABLE_A.Col_1 <> 0 AND TABLE_A.Col_1 <= .5 THEN 'A'
  ELSE 'B'
END