From db28df088b64a7a2c4a784d7d49476ef395bffe4 Mon Sep 17 00:00:00 2001
From: Justin Lin <caterpillar@openhome.cc>
Date: Fri, 16 Aug 2019 09:50:38 +0800
Subject: [PATCH] updata doc

---
 docs/lib2-rand.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/docs/lib2-rand.md b/docs/lib2-rand.md
index dceef6c0..fac5d086 100644
--- a/docs/lib2-rand.md
+++ b/docs/lib2-rand.md
@@ -4,8 +4,8 @@ Random number generator. Generates a pseudo random number.
 
 ## Parameters
 
-- `min_value` : Minimum value of random number range.
-- `max_value` : Maximum value of random number range.
+- `min_value` : Minimum value of random number range. Default to 0.
+- `max_value` : Maximum value of random number range. Default to 1.
 - `seed_value` : Optional. Seed value for random number generator for repeatable results. 
 
 ## Examples