10 DEF FN M(N) = ((A / N) - INT (A / N)) * N
20 FOR A = 1 TO 100
30 LET O$ = ""
40 IF FN M(3) = 0 THEN O$ = "FIZZ"
50 IF FN M(5) = 0 THEN O$ = O$ + "BUZZ"
60 IF O$ = "" THEN O$ = STR$ (A)
70 PRINT O$
80 NEXT A