Updating readme

Author: DrkSephy

README.md

@@ -1 +1,23 @@
-# es6-cheatsheet
+# es6-cheatsheet
+
+> A cheatsheet containing ES6 tips, tricks and code snippet examples for your day to day workflow. Contributions are welcome!
+
+## var versus let / const
+
+> Besides var, we now have access to two new identifiers for storing values - **let** and **const**. Unlike **var**, **let** and **const** statements are not hoisted to the top of their enclosing scope. 
+
+An example of using var:
+
+```javascript
+var snack = 'Meow Mix';
+
+function getFood(food) {
+    if (food) {
+        var snack = 'Friskies';
+        return snack;
+    }
+    return snack;
+}
+
+getFood(false); // undefined
+```