For nums = [1, 2, 3, 1], when can we return true?

Question

For nums = [1, 2, 3, 1], when can we return true?

Option A

At the first 1

Option B

At value 2

Option C

At value 3

Option D — Correct answer

At the final 1

Explanation

When the final 1 is read, it already exists in the set.

Contains Duplicate - Set Pattern Practice Quiz