Before we begin, it is worth mentioning some conventions in Unity.
Variables - begin with a lowercase letter. Variables are used to store information about
any aspects of a game’s state.
Functions - begin with an uppercase letter. Functions are blocks of code which are
written once and can then be reused as often as needed.
Classes - begin with an uppercase letter. These can be thought of as collections of
functions.
Tip: When reading example code or the Unity API, pay close attention to the first letter of
words. This will help you better understand the relationship between objects.