How to print a unique elements of an Array

Sun Light

9y955Visual Basic .NET

Hi,

Can Someone please tell me a program How to print a unique elements of an Array in C #.

Thanks

3 Replies

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Rupesh Kahane9y ago
Accepted answer
Try below solution
Using LINQ
List<int> ages = new List<int> { 21, 46, 46, 55, 17, 21, 55, 55 };

            IEnumerable<int> distinctAges = ages.Distinct();

            Console.WriteLine("Distinct ages:");

            foreach (int age in distinctAges)
            {
                Console.WriteLine(age);
            }
All the best
Mobeen Rashid9y ago
Actually there are multiple ways to do that and good news is you don't have to write any algorithm. All we need is to convert "int[,,]" to a collection that implemets "IEnumerable" interface and then we'll apply "Distinct" LINQ operator on collection, the "Distinct" operator will return us a unique number from collection.

Before applying any LINQ operator make sure you have following using statement.
using System.Linq;
This is where all the LINQ operators on "IEnumerable" and "IEnumerable" interfaces lives as extension methods

Way #1: If you have an array declared like this
var arr = new int [ 1, 2,3 ];
//converting array to list
var arrList = arr.OfType<int>().ToList();
  //getting unique number
var uniqueNumber = arrList.Distinct();
Way #2: Declaring array using object initializer syntax give us an enumeratable collection by default and we don't need to convert it to "List".
var arrList = new int[] { 1, 1, 2, 2, 3 };
var uniqueNumber = arrList.Distinct();
Rajkiran Swain9y ago
1. foreach (element e in array)
2. {
4. int count = 0;
5. foreach (element tmp in array)
6. if (e.equals(tmp) count++;
8. if (count < 2) // that means it is unique as requested in the question
9. PrintOrSomethingElse(e); // perform your desired action with the element here or collect it into a collection etc
12. }
http://www.softwareandfinance.com/CSharp/Unique_Elements_Arrays.html