Question

How to find elements which are in array1 and not in array2 in C#

Answer 1

using System;
using System.Linq;

class Program
{
    static void Main() {
        int[] arr1 = {1, 3, 8,  9, 17, 18};
        int[] arr2 = {1, 8, 5, 12, 18, 19, 100, 120};
        
        var arr = arr1.Except(arr2).ToArray();

        Console.WriteLine(string.Join(" ", arr));
    }
}



/*
run:

3 9 17

*/

 

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Answer 2

using System;
using System.Linq;

class Program
{
    static void Main() {
        int[] arr1 = {1, 3, 8,  9, 17, 18};
        int[] arr2 = {1, 8, 5, 12, 18, 19, 100, 120};
    
        foreach(int n in arr1.Except(arr2))            
                Console.WriteLine(n);
    }
}



/*
run:

3
9
17

*/

 

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