Data Types Fundamentals

This course gives you a solid, hands-on foundation in JavaScript data types: you’ll understand why they exist and how they affect every operation. You’ll learn to diagnose with typeof, work with String, Number, and Boolean, and handle the absence values—undefined and null—without errors. You’ll grasp implicit coercion and truthy/falsy values to write reliable conditionals. You’ll then move on to modeling information with Arrays and Objects, accessing data via indices and dot notation, and applying a systematic method to inspect and navigate the nested structures typical of API responses. By the end, you’ll be able to identify, transform, and consume data with sound judgment, avoid common pitfalls, and lay the groundwork for business logic and more advanced integrations.