def below
import bend-kit-random@0.1.0.1/random.bend as Randomimport Base
73# A uniform U32 in [0, n). Each draw is rejected with odds under 1/2, so after
74# 64 rejections, odds 2^-64, it takes x mod n. For n < 2 it is 0 and r is unchanged.
75def below(+n: U32, r: Rng) -> U32 & Rng:
76 below.if(U32.is_lt(n, 2), n, r)