Adding comment about steps for makeCacheMatrix function.

Author: rakhmad

cachematrix.R

@@ -2,7 +2,11 @@
 ## some benefit to caching the inverse of a matrix rather than compute 
 ## it repeatedly
 
-
+## makeCacheMatrix creates a list containing a function to
+## 1. set the value of the matrix
+## 2. get the value of the matrix
+## 3. set the inverse value of the matrix
+## 4. get the inverse value of the matrix
 makeCacheMatrix <- function(x = matrix()) {
 
 }