feat: add type operators

Author: ExploitEngineer

part1 (Basics)/18_type.js

@@ -0,0 +1,20 @@
+// Type Operators in JavaScript
+
+/*
+typeof       Returns the data type of a variable or expression.
+instanceof   Checks if an object is an instance of a constructor.
+in           Checks if a property exists in an object.
+*/
+
+// typeof
+console.log(typeof 42);          // Output: "number"
+console.log(typeof 'hello');     // Output: "string"
+
+// instanceof
+console.log([] instanceof Array); // Output: true
+console.log({} instanceof Object); // Output: true
+
+// in
+const person = {name: 'Alice', age: 25};
+console.log('age' in person);   // Output: true
+console.log('salary' in person);// Output: false