First version

Author: Appan Ponnappan

cachematrix.R

@@ -1,15 +1,34 @@
 ## Put comments here that give an overall description of what your
 ## functions do
 
-## Write a short comment describing this function
-
+## Function to cache the inverse of input matrix x
 makeCacheMatrix <- function(x = matrix()) {
-
+  inv <- NULL
+  set <- function(y) {
+    x <<- y
+    inv <<- NULL
+  }
+  get <- function() x
+  setInv <- function(m_inv) inv <<- m_inv
+  getInv <- function() inv
+  list(set = set, get = get,
+       setInv = setInv,
+       getInv = getInv)
 }
 
 
-## Write a short comment describing this function
-
+## Find the inverse of the input matrix x. 
+## If it is not found in cache, find the inverse for the first time & return it.
+## Else return it from the cache itself.
+## Return a matrix that is the inverse of 'x'
 cacheSolve <- function(x, ...) {
-        ## Return a matrix that is the inverse of 'x'
+  inv <- x$getInv()
+  if(!is.null(inv)) {
+    message("getting cached data")
+    return(inv)
+  }
+  data <- x$get()
+  inv <- solve(data)
+  x$setInv(inv)
+  inv
 }