FUNCTION min (a, b)
    IF a < b THEN min = a ELSE min = b
END FUNCTION

FUNCTION Hamming (limit)
    DIM h(limit)

    h(0) = 1
    x2 = 2
    x3 = 3
    x5 = 5
    i = 0
    j = 0
    k = 0
    FOR n = 1 TO limit
        h(n) = min(x2, min(x3, x5))
        IF x2 = h(n) THEN
            i = i + 1
            x2 = 2 * h(i)
        END IF
        IF x3 = h(n) THEN
            j = j + 1
            x3 = 3 * h(j)
        END IF
        IF x5 = h(n) THEN
            k = k + 1
            x5 = 5 * h(k)
        END IF
    NEXT n
    Hamming = h(limit - 1)
END FUNCTION

PRINT "The first 20 Hamming numbers are :"
FOR i = 1 TO 20
    PRINT Hamming(i); " ";
NEXT i

PRINT
PRINT "H( 1691) = "; Hamming(1691)