Module 1: Understanding Block Scope

app.js

@@ -1,9 +1,5 @@
-function greeting() {
-    let message = 'Hello';
-    let sayHi = function hi() {
-        let message = 'Hi';
-    };
-    sayHi();
-    console.log(message); // Hello as 'Hi' is out of scope
+let message = 'Hello';
+if (message === 'Hello') {
+    var count = 100; // var is within global scope, when it's not within object or function
 }
-greeting();
+console.log(count); // No reference error, which is dangerous