chickadee » srfi-141 » euclidean-remainder

If d > 0, q = floor(n/d); if d < 0, q = ceiling(n/d).

This division operator pair satisfies the stronger property

   0 <= r < |d|

used often in mathematics. Thus, for example, (euclidean-remainder numerator denominator) is always a valid index into a vector whose length is at least the absolute value of denominator. This division operator pair is so named because it is the subject of the Euclidean division algorithm.