10 REM Damm algorithm
20 DIM DT(9,9)
30 FOR Y=0 TO 9:FOR X=0 TO 9
40 READ DT(X,Y)
50 NEXT X:NEXT Y
60 N$="":INPUT N$:IF N$="" THEN 130
70 D=0
80 FOR I=1 TO LEN(N$)
90 D=DT(VAL(MID$(N$,I,1)),D)
100 NEXT I
110 IF D THEN PRINT "FAIL":GOTO 60
120 PRINT "PASS":GOTO 60
130 END
140 DATA 0,3,1,7,5,9,8,6,4,2
150 DATA 7,0,9,2,1,5,4,8,6,3
160 DATA 4,2,0,6,8,7,1,3,5,9
170 DATA 1,7,5,0,9,8,3,4,2,6
180 DATA 6,1,2,3,0,4,5,9,7,8
190 DATA 3,6,7,4,2,0,9,5,8,1
200 DATA 5,8,6,9,7,2,0,1,3,4
210 DATA 8,9,4,5,3,6,2,0,1,7
220 DATA 9,4,3,8,6,1,7,2,0,5
230 DATA 2,5,8,1,4,3,6,7,9,0