"""
INPUT FUNCTION - input()
    user_name = input("Enter your name: ")

Note: Python input() function always returns a string

Converting user input
    age = input("Enter your age: ")
    age = int(age)

Nested functions in Python
    age = int(input("Enter your age: "))
    age = float(input("Enter your age: "))

For the purpose of this course, you will not worry about validating and sanitizing user
input. If you are interested in learning more about it, you can check out exception
handling in Python.
"""