diff --git a/core-tutorial/hello_world.py b/core-tutorial/hello_world.py
index 974f97c..4f8e434 100644
--- a/core-tutorial/hello_world.py
+++ b/core-tutorial/hello_world.py
@@ -10,8 +10,9 @@
 node2 = tf.constant(4.0) # also tf.float32 implicitly
 
 # Just prints info about the nodes. Doesn't actually run them.
+# printing ("hello world")
 print(node1, node2)
 
 # Here, we actually run the nodes in a session
 sess = tf.Session()
-print(sess.run([node1, node2]))
\ No newline at end of file
+print(sess.run([node1, node2]))