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What is the rest operator?

Q: What is the rest operator?

Short answer: The rest operator ... collects multiple arguments into an array. Example code function sum(...nums) { return nums.reduce((a, b) => a + b); Follow me on LinkedIn: } console.log(sum(1, 2, 3)); // 6 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 Define — one clear sentence (the short answer above). Example — relate it to a project like ShopNest or your real work. Trade-off — when you would not use it.

Short answer: The rest operator ... collects multiple arguments into an array.

Example code

function sum(...nums) { return nums.reduce((a, b) => a + b); Follow me on LinkedIn: } console.log(sum(1, 2, 3)); // 6

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

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

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