matthewmjm

Questions
What is scope? Your explanation should include the idea of global vs. local scope.
Scope defines how a variable may be accessed, or not accessed, at different points in the code.  There are two types of scope:
global scope and local scope.  A variable declared outside a function is considered global scope  and is able to be accessed 
through-out your code.  A variable declared within a function is considered local scope and can only be accessed within the 
function to where it resides.

Why are global variables avoided?
Global variables can cause uninteded side effects causing the code to be indeterminate which can yield different output given
the same imput.  Thereby creating code that can be difficult to debug.

matthewmjm

Square Area:  http://jsbin.com/vezucav/edit?html,js,console
Temperature Conversion:  http://jsbin.com/rocapis/edit?html,js,console
Is Divisible:  http://jsbin.com/woxuli/edit?html,js,console

matthewmjm

Wiseperson generator:  http://jsbin.com/liyaweb/edit?html,js,console
Shouter:  http://jsbin.com/lavezu/edit?html,js,console
Text normalizer:  http://jsbin.com/coxopun/edit?html,js,console