added ext print function

Author: RaeesStevens

Sprint-2/1-key-exercises/3-paths.js

@@ -19,7 +19,8 @@ console.log(`The base part of ${filePath} is ${base}`);
 
 const dir = filePath.slice(0,lastSlashIndex);
 console.log(dir);
-const LastDotIndex = base.lastIndexOf(".");
-const ext = base.slice("/");
+const lastDotIndex = base.lastIndexOf(".");
+const ext = base.slice("lastDotIndex + 1");
+console.log(ext);
 
-// https://www.google.com/search?q=slice+mdn
+// https://www.google.com/search?q=slice+mdn