feat: add IIFE

Author: ExploitEngineer

part5 (Functions)/AdvanceFunctions/05_IIFE.js

@@ -0,0 +1,17 @@
+/*
+INFO: ⚡ What is an IIFE ?
+IIFE Stands for (Immediately Invoked Function Expression). It's a function that executes immediately after it's defined, without needing to be called later.
+*/
+
+// Syntax 
+(function() {
+  console.log("I run immediately!");
+})();
+
+// Example 
+(function() {
+  const message = "Hello from IIFE!";
+  console.log(message);
+})();
+// console.log(message); // ❌ Error: message is not defined
+