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Closures are one of the most powerful yet often confusing concepts in JavaScript. In this long-format session, we dive deep into what closures are, when they are used, where they occur naturally, and how they work behind the scenes.

The video begins with a clear definition of a closure, using simple code snippets to explain how functions remember the scope in which they were created—even after that scope has finished execution. We then move on to practical scenarios where closures shine: creating private variables, building function factories, managing asynchronous code, and optimizing memory usage.

You will also see step-by-step walkthroughs of closure examples, starting from small snippets to real-world cases. We break down each example carefully so you understand not only how closures behave, but why they are essential in modern JavaScript programming.

This discussion highlights:

When closures are created: during function execution and variable binding.

Where closures appear: inside callbacks, event handlers, setTimeout/setInterval, and higher-order functions.

How closures are applied: in modular design, encapsulation, and efficient coding patterns.

By the end of this video, you’ll be confident in identifying closures in your own projects and applying them effectively in advanced coding situations.

About Novum Labs
Novum Labs is a premier institute for AI and Computer Science education, guiding students from school level to advanced B.Tech/BCA programs and beyond. We believe in blending strong fundamentals with real-world application. Along with AI, Data Science, and Programming, we emphasize core subjects like JavaScript, Python, and modern software engineering practices. Our mission is to make technology learning structured, engaging, and impactful for every learner.

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