Question

How to get all the unique elements of an array in C#

Answer 1

using System;

public class Program
{
    public static void Main()
    {
        int[] arr = {4, 1, 2, 8, 9, 5, 1, 7, 8, 8, 8};
        int[] frequency = new int[10];
        
        for (int i = 0; i < arr.Length; i++) {
            frequency[arr[i]]++;
        }

        for (int i = 0; i < 10; i++) {
            if (frequency[i] == 1)
                Console.WriteLine("{0}: - {1} time", i, frequency[i]);
        }
    }
}




/*
run:

2: - 1 time
4: - 1 time
5: - 1 time
7: - 1 time
9: - 1 time

*/

 

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