AVA language, please add test screenshot public static int[] makeIntoPalindrome​(int[] arr) Makes a palindrome from a given array by appending the smallest possible number of elements. For example, makeIntoPalindrome([1, 3, 7]) returns [1, 3, 7, 3, 1] makeIntoPalindrome([5, 4, 1, 3, 3, 1]) returns [5, 4, 1, 3, 3, 1, 4, 5] makeIntoPalindrome([1, 3, 3, 1]) returns [1, 3, 3, 1] makeIntoPalindrome([1, 4, 3, 2]) should return [1, 4, 3, 2, 3, 4, 1]. Parameters: arr - an array Returns: a new array that is a palindrome obtained by appending the fewest number of elements onto arr

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Array

The simplest way to start thinking about an array is as a collection, or a set of elements. In programming, these elements may be constants, variables, functions and pointers.