2 hypot - hypotenuse of a right-angled triangle given the other sides
14 Returns sqrt(x^2 + y^2) to the nearest multiple of eps.
15 The default value for eps is epsilon().
18 > print hypot(3, 4, 1e-6), hypot(2, -3, 1e-6)
25 NUMBER *qhypot(NUMBER *q1, *q2, *epsilon)