The var keyword and the scope

var_keyword.js

var myVariable = "Hi, I am a global variable";

function sayHello() {
  myVariable = "Hi, I am locally produced!";
  console.log(myVariable);
}

console.log(myVariable); 	// Prints "Hi, I am a global variable"
sayHello();               // Prints "Hi, I am locally produced!"
console.log(myVariable);	// Prints "Hi, I am locally produced!"