Execution Order In A Transaction Batch

Is the order of execution guaranteed to go from top to bottom in a transaction that has multiple statements like below?


BEGIN TRAN T1;
UPDATE table1 ...;
UPDATE table2 ...;
SELECT * from table1;
UPDATE table3 ...;
COMMIT TRAN T1;


How about here?

BEGIN TRAN T1;
UPDATE table1 ...;
BEGIN TRAN M2 ;
UPDATE table2 ...;
SELECT * from table1;
COMMIT TRAN M2;
UPDATE table3 ...;
COMMIT TRAN T1;

how can i guarantee that statements will be executed from top to bottom in a transaction batch like above? I am not interested in the errors in statements. I just want whole thing to either execute fully from top to bottom or none executes