Update 13_list_comprehension.md

Author: kunal254

13_Day_List_comprehension/13_list_comprehension.md

@@ -92,7 +92,7 @@ numbers = [-8, -7, -3, -1, 0, 1, 3, 4, 5, 7, 6, 8, 10]
 positive_even_numbers = [i for i in range(21) if i % 2 == 0 and i > 0]
 print(positive_even_numbers)                    # [2, 4, 6, 8, 10, 12, 14, 16, 18, 20]
 
-# Flattening a three dimensional array
+# Flattening a two dimensional array
 list_of_lists = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]
 flattened_list = [ number for row in list_of_lists for number in row]
 print(flattened_list)    # [1, 2, 3, 4, 5, 6, 7, 8, 9]