SO Example, C# - rextester

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//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {
            int[] forArray = new int[10];
            
            for (int k = 1; k < 10; k++)  // k < 10 instead of k <= 10
            {
                forArray[k] = k * 2;
                Console.WriteLine(k); // test
                
                //forArray[0] = SKIPPED
                //forArray[1] = 2
                //forArray[2] = 4
                //forArray[3] = 6
                //forArray[4] = 8
                //forArray[5] = 10
                //forArray[6] = 12
                //forArray[7] = 14
                //forArray[8] = 16
                //forArray[9] = 18
                //forArray[10] INVALID
            }
            for (int k = 0; k < 10; k++)
            {
                Console.WriteLine(forArray[k]);
            }
        }
    }
}

Show compiler warnings [ + ] Show input
Compilation time: 0,14 sec, absolute running time: 0,08 sec, cpu time: 0,08 sec, average memory usage: 13 Mb, average nr of threads: 3