Q. What will be the output of the code below?

Code: 
let a;
console.log(a === undefined);
  • (A) true
  • (B) false
  • (C) null
  • (D) ReferenceError
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✅ Correct Answer: (A) true
Explanation: A variable declared but not initialized is `undefined` in JavaScript. Therefore, the comparison `a === undefined` returns `true`.

Published by Mr. Dubey ⭐ 111.54K Points at 06-Jun-2025 09:30 pm in JavaScript

Explanation by: Mr. Dubey
A variable declared but not initialized is `undefined` in JavaScript. Therefore, the comparison `a === undefined` returns `true`.

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