diff --git a/cost function code b/cost function code
index b931a7e..ad51f4a 100644
--- a/cost function code	
+++ b/cost function code	
@@ -1,3 +1,4 @@
+#import 
 import csv
 	import math
 	import numpy as np
@@ -9,7 +10,7 @@ import csv
 	
 
 	
-
+#cost funtion
 	def compute_cost(X, y, theta):
 	    J = 0
 	    A = np.subtract(np.dot(X, theta), y)
@@ -18,7 +19,7 @@ import csv
 	
 
 	
-
+#gradient descent
 	def gradient_descent(X, y, theta, alpha, epsilon, flag):
 	    J_hist = []
 	    all_thetas0 = []
@@ -55,7 +56,7 @@ import csv
 	
 
 	
-
+#main
 	def main(x_training, y_training):
 	    x_training = x_training.T
 	    y_training = y_training.T