func math/rand.Intn

3 uses

	math/rand (current package)
		rand.go#L337: func Intn(n int) int { return globalRand.Intn(n) }

	net/http
		server.go#L2744: 		interval := pollIntervalBase + time.Duration(rand.Intn(int(pollIntervalBase/10)))

	src.elv.sh/pkg/eval
		builtin_fn_num.go#L594: 	return low + rand.Intn(high-low), nil