Avoid JavaScript Variables Getting Hoisted

gistfile1.js

var scope = "global";
function() {
  console.log(scope);  //  this produces undefined, not "global"
  var scope = "local";
  console.log(scope);  //  this produces "local"
}

// JavaScript doesn't use block scope, so what is actually happening is equal to below
function() {
  var scope;
  console.log(scope);  //  the variable exisits but is undefined
  scope = "local";     //  variable is initialized and given a value
  console.log(scope);
}