Question

How to BinarySearch an array in C#

Answer 1

using System;

public class Test  {

   public static void Main()  {

        int[] arr = { 5, 7, 8, 2, 1, 3, 6 }; 
        
        Array.Sort(arr); 
  
        foreach(int n in arr) 
            Console.Write(n + " "); 

        Console.WriteLine();
        Console.WriteLine(Array.BinarySearch(arr, 5)); 
        Console.WriteLine(Array.BinarySearch(arr, 9)); 
        Console.WriteLine(Array.BinarySearch(arr, 0)); 
   }
}



/*
run:

1 2 3 5 6 7 8 
3
-8
-1

*/

 

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