TSQL - User defined function that retrieves the lower of two given integer numbers

/*

       -- Execution

       select dbo.getLowerInt( '201201', '201112' );

       select dbo.getLowerInt( '201201', null );

       select dbo.getLowerInt( null, '201201' );

       select dbo.getLowerInt( null, null );

*/

ALTER function [dbo].[getLowerInt](

       @int1 int

       , @int2 int

)

returns int

as

begin

       return(

              case

                     when isnull(@int1,0) <= isnull(@int2,0)

                     then @int1

                     else @int2

              end

       );

end

;