just-Bri/scope_stuff

## scope_stuff
What is scope? Your explanation should include the idea of global vs. block scope.
The part of a file/program that a certain function is accessible, block being within a function etc. Global being defined outside of a function and available anywhere.

Why are global variables avoided?
They can cause serious issues with scope and may intefer with code you did not write.

Explain JavaScript's strict mode
When a variable is declared without the let or const keyword, an error will be triggered.

What are side effects, and what is a pure function?
A pure function returns something and does not alter any outside code.
Side affects are caused when a function alters code outside of itself.
	What is scope? Your explanation should include the idea of global vs. block scope.
	The part of a file/program that a certain function is accessible, block being within a function etc. Global being defined outside of a function and available anywhere.

	Why are global variables avoided?
	They can cause serious issues with scope and may intefer with code you did not write.

	Explain JavaScript's strict mode
	When a variable is declared without the let or const keyword, an error will be triggered.

	What are side effects, and what is a pure function?
	A pure function returns something and does not alter any outside code.
	Side affects are caused when a function alters code outside of itself.