XACT_STATE in SQL Server -

XACT_STATE is like @@TRANCOUNT function to detect if there is active transaction. But it has advantage over @@TRANCOUNT since it gives us more information whether the transaction is committable or not.
Let for example I have an delete operation and I want to insert the deleted rows to a log table inside a transaction and I want to make sure the delete succeeds even if the insert fails. Then XACT_STATE() comes handy.

--Let us get prepare our table and the log table 
CREATE TABLE table1 
  ( 
     col1 INT IDENTITY(1, 1), 
     col2 VARCHAR(20) 
  ); 
 
go 
 
CREATE TABLE logtable 
  ( 
     col1 INT, 
     col2 VARCHAR(20) 
  ); 
 
go 
 
TRUNCATE TABLE table1; 
INSERT INTO table1(col2) 
	VALUES     ('To be deleted'); 
 
--Now let us start our transaction and move on 
SET XACT_ABORT ON; 
 
BEGIN try 
    BEGIN TRANSACTION 
 
    DELETE table1 WHERE  col1 = 1; 
 
    INSERT INTO logtable (col1, col2) 
		SELECT col1, col2 
		FROM   table1 
		WHERE  col1 = 1; 
 
    COMMIT TRANSACTION 
END try 
 
BEGIN catch 
    IF ( Xact_state() ) = 1 
      BEGIN            
	   PRINT 'This is Committable transaction.'; 
 
          COMMIT TRANSACTION; 
      END 
    ELSE IF ( Xact_state() ) = -1 
      BEGIN 
          PRINT 'This is Uncommenting transaction.'; 
 
          ROLLBACK TRANSACTION;
      END; 
END catch 
 
go