Contains Duplicate

Difficulty: Easy | Category: Array | Asked at: Apple, Microsoft | Platform: Unfoldd Arena

# Contains Duplicate Given an integer array `nums`, return `true` if any value appears **at least twice** in the array, and return `false` if every element is distinct. --- ### Examples **Example 1:** ```text Input: nums = [1,2,3,1] Output: true ``` **Example 2:** ```text Input: nums = [1,2,3,4] Output: false ``` **Example 3:** ```text Input: nums = [1,1,1,3,3,4,3,2,4,2] Output: true ``` --- ### Constraints | Property | Limit | | :--- | :--- | | **Array Length** | `1 <= nums.length <= 10^5` | | **Element Value** | `-10^9 <= nums[i] <= 10^9` |

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Contains Duplicate

Easy

Contains Duplicate

Given an integer array

nums
, return
true
if any value appears at least twice in the array, and return
false
if every element is distinct.

Examples

Example 1:

Input: nums = [1,2,3,1] Output: true

Example 2:

Input: nums = [1,2,3,4] Output: false

Example 3:

Input: nums = [1,1,1,3,3,4,3,2,4,2] Output: true

Constraints

PropertyLimit
Array Length
1 <= nums.length <= 10^5
Element Value
-10^9 <= nums[i] <= 10^9
CompaniesAppleMicrosoft
JavaScript

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