Contains Duplicate

Easy

Given an integer array nums, return true if any value appears at least twice, and false if every element is distinct.

Example 1

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

Example 2

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

Constraints

• 1 <= nums.length <= 10^5
• -10^9 <= nums[i] <= 10^9