[Contains Duplicate](https://leetcode.com/problems/contains-duplicate/)
You can find the source code https://github.com/SivaprasadTamatam/Go-DSA/tree/main/Arrays/3-%20Contains%20Duplicate
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.
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
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