fixed certain functions, simplified the code and added descrption for certain lines of code. [perfect code]

assignment-2.py

@@ -1,3 +1,14 @@
+'''
+Problem Statement: Write a Python program to store marks scored in subject “Fundamental of Data Structure” by N students in the class. Write functions to compute following:
+a) The average score of class
+b) Highest score and lowest score of class
+c) Count of students who were absent for the test
+d) Display mark with highest frequency
+
+Code from Data Structure Lab (SPPU - Second Year - Computer Engineering - Content) repository on KSKA Git: https://git.kska.io/sppu-se-comp-codes/DSL
+'''
+
+# BEGINNING OF CODE
 # List for storing marks
 marks = []
 total = int(input("Total number of students are:\t"))
@@ -83,3 +94,4 @@ def main():
         else:
             print("\n\nPlease choose a valid option (1-5)\n\n")
 main()
+# END OF CODE