Scope refers to how accessable certain information is within JavaScript. Scope is either block (local), or global. In the instance
of block scope, the information, such as a variable, will only be available within the container it is in, such as a function. Global scope
however allows the information to be recalled later in your script regardless, and can even be accessed across files.

Global variables are avoided because of the likelyhood of creating bugs in your code. When multiple seperate functions rely on a global
variable, it can cause data to be altered and thus alter the outcome of a function inappropriately. Avoiding a variable that is global
preserves the efficiancy of your code, as well as limits your time spent fixing broken code that was improperly altered.

JavaScripts strict mode is a convenient way to avoid undeclared variables. Unless using the jQuery library, keeping const or let infront
of your variables is standard. These keywords maintain the purity of our code, as well as mange the variables capabilities. When
implementing strict mode in JavaScript, your code will relay an error anytime your variable is not properly declared with let or const.

Side effects are unwanted results that are returned from your functions. They can happen anytime your code is not using proper variables or
relies on global scope for certain variables. Pure code is code that is both determinate, meaning provides consistent results, and has no
side effects. Your code should always be created the oure intent.