comments added and new console logs

Author: ferdiaz93

JavaScript_Basics/variables.js

@@ -2,14 +2,16 @@
 
 // There is only 3 types of variables in javascript
 
-let userNickname = "Swapnil"; // New type introduced in ES6. Value of let can change any time.
+var day26 = 26;// This is Deprecated as this creates many problems in future.
+//Variables created with var can be rewrite but the most important problem is about the scope.
 
+let userNickname = "Swapnil"; // New type introduced in ES6. Value of let can change any time.
 userNickname = "Swap76";
+console.log(userNickname) // Output {"Swap76"}
 
 const PI = 3.14;// New type introduced in ES6. Value of pi now cannot be changed as this is defined as const.
-
-var day26 = 26;// This is Deprecated as this creates many problems in future.
-
+PI = 2; // Output {Error: PI is read only}
+console.log(PI) // Output {3.14}
 
 
 //Tips: *use significatives variables names, example: