Loop an Array in React — React Technical Interview Questions & Answers

Loop an Array in React

Loop an Array in React

  • Freshers google ‘loop array in React’ because for/while feel natural. Inside JSX braces you need an expression. map is that expression. Outside JSX, a normal for is fine: build rows, then {rows} in the return.
  • forEach doesn’t return anything useful for JSX — it returns undefined. That’s why tutorials insist on map, not forEach.
  • Loop an Array in React — on screen: Asha, Kabir, Neha. for is fine in JS above return — not inside JSX braces as a statement.

Technical Interview Tip: map not forEach inside JSX.

Code Examples for Loop an Array in React

Example

// Loop array
const names = ["Asha", "Kabir", "Neha"];

export default function Roll() {
  return (
    <ul>
      {names.map((n) => (
        <li key={n}>{n}</li>
      ))}
    </ul>
  );
}

Loop an Array in React — on screen: Asha, Kabir, Neha. for is fine in JS above return — not inside JSX braces as a statement.

How to Explain Loop an Array in React to an Interviewer

Explain Loop an Array as if you are teaching a junior — definition, then one tiny UI.

map. for is OK.

What does the example show on screen (or print), and what does that prove?

Loop an Array in React — on screen: Asha, Kabir, Neha

What mistake do freshers make with Loop an Array?

forEach in JSX.