set value based on value

I assume there is a more elegant way to do the following. Please enlighten.
@iff %_DOWI = 1 set DDRV=T
@iff %_DOWI = 2 set DDRV=U
@iff %_DOWI = 3 set DDRV=V
@iff %_DOWI = 4 set DDRV=W
@iff %_DOWI = 5 set DDRV=X
@iff %_DOWI = 6 set DDRV=Y
@iff %_DOWI = 7 set DDRV=Z