From 62f8be6026f56b9dec07fb4cf237e68c3fa678cb Mon Sep 17 00:00:00 2001
From: Tajinder Chumber <chumbert94@gmail.com>
Date: Wed, 15 Aug 2018 14:25:17 +0100
Subject: [PATCH] adding docs on exercises in chapter 3

---
 chapter3/excersises.ex | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/chapter3/excersises.ex b/chapter3/excersises.ex
index a92b69e..b05ed13 100644
--- a/chapter3/excersises.ex
+++ b/chapter3/excersises.ex
@@ -1,4 +1,10 @@
 defmodule Exercise do
+  @moduledoc """
+  Exercises from The Little Elixir & OTP Guidebook, Section 3.6
+
+  Write a program that spawns two processes. The first process, on receiving a `ping` messag, should reply with a `pong` message. The second process, on receiving a `pong` message, should reply with a `ping` message.
+  """
+
   def run() do
     pboss = spawn(ProcessBoss, :loop, [])
     pid1 = spawn(Process1, :loop, [])