FUNCTION BIN$ (N)
    N = ABS(INT(N))
    B$ = ""
    DO
        B$ = STR$(N MOD 2) + B$
        N = INT(N / 2)
    LOOP WHILE N > 0
    BIN$ = B$
END FUNCTION

fmt$ = "#### -> &"
PRINT USING fmt$; 5; BIN$(5)
PRINT USING fmt$; 50; BIN$(50)
PRINT USING fmt$; 9000; BIN$(9000)