Challenge: In your own words

gistfile1.txt

A) What is scope? Your explanation should include the idea of global vs. local scope.

R= the scope defines how you can or can not access the variables that you declare in different points of your code. 
When you declare a variable in the global scope, it is available throughout the code.  
When you declare a variable in the local scope, it will be available only within the function 

B) Why are global variables avoided?

R= the use of global variables can generate unintentional errors in my code when I have local variables called in the same way

C) Explain JavaScript's strict mode

R= imposes the strict use of Javascript in my code

D)What are side effects, and what is a pure function?

R= a function is pure when it is determined and has no side effects

E) Explain variable hoisting in JavaScript.

R = Elevation refers to the way in which the JS interpreter finds each variable declaration within a certain scope, 
and moves it to the beginning of that scope.