Creates an and array and looks for the index of a given value from either end

  
/*
C# Programming Tips & Techniques
by Charles Wright, Kris Jamsa

Publisher: Osborne/McGraw-Hill (December 28, 2001)
ISBN: 0072193794
*/

//
// Index.cs -- Creates an and array and looks for the index of a given
//             value from either end.
//
//             Compile this program with the following command line:
//                 C:>csc Index.cs
//
namespace nsArray
{
    using System;
    
    public class Index
    {
        static public void Main ()
        {
            int [] Arr = new int [12]
                        {29, 82, 42, 46, 54, 65, 50, 42, 5, 94, 19, 34};
            Console.WriteLine ("The first occurrence of 42 is at index "
                               + Array.IndexOf(Arr, 42));
            Console.WriteLine ("The last occurrence of 42 is at index "
                               + Array.LastIndexOf(Arr, 42));
            int x = 0;
            while ((x = Array.IndexOf (Arr, 42, x)) >= 0)
            {
                Console.WriteLine ("42 found at index " + x);
                ++x;
            }
            x = Arr.Length - 1;
            while ((x = Array.LastIndexOf (Arr, 42, x)) >= 0)
            {
                Console.WriteLine ("42 found at index " + x);
                --x;
            }
        }
    }
}

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Creates an and array and looks for the index of a given value from either end : Array « Collections Data Structure « C# / C Sharp

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