What are functions in JavaScript?

Short answer: Functions are blocks of reusable code that perform a specific task. Example: function greet(name) { return `Hello, ${name}`; }

Example code

Functions are blocks of reusable code that perform a specific task. Example: function greet(name) { return `Hello, ${name}`;
}

Real-world example (ShopNest)

ShopNest’s browser cart uses modern JavaScript: fetch APIs with async/await, modules, and clear error handling.

Say this in the interview

1. Define — one clear sentence (the short answer above).
2. Example — relate it to a project like ShopNest or your real work.
3. Trade-off — when you would not use it.