feat: add arrow functions

Author: ExploitEngineer

part5 (Functions)/AdvanceFunctions/03_arrow.functions.js

@@ -0,0 +1,19 @@
+/*
+:INFO: 🏹 What is an Arrow Function?
+Arrow functions are a concise syntax for writing functions introduced in ES6. They are great for writing short functions and callbacks. 
+*/
+
+// Syntax 
+const functionName = (parameters) => {
+  console.log("Hi");
+};
+
+// Example 
+const greet = (name) => {
+  console.log(`Hello, ${name}`);
+};
+greet("Rafay");
+
+// One-liner return (implicit return)
+const square = n => n * n;
+console.log(square(5));