"""
Author: Nguyen Duy Tuan
Date: 29/08/2021
Program: Exercise_06_page_46.py
Problem:
    List two of the purposes of program documentation.
Solution:
    -Program document is used to define the strategy used by the module or code.
    _Documentation written in the program helps other programmers who have not written the code, to understand the
    functionality and the usage of variable and functions.

"""
