using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        var isOdd = IsOddNumber(4);

        Console.WriteLine(isOdd);

        int[] testArray = { 2, 4, 6, 8, 10 };

        var result = IsOddNumberInArray(testArray);

        Console.WriteLine(result);

         int[] input2 = { 14, 7, 21, 8, 9, 6, 34, 87, 94, 3 };

         int[] result2 = List1(input2);

         foreach(int b in result2)

         {

             Console.WriteLine(b);

         }

         Console.ReadLine();

​

    public static int[] List1(int[] input)

    {

          int len = input.Length;

          List<int> ArrayList = new List<int>();

          for (int i = 0; i < len - 1; i++)

          {

              if (input[i] < 10)

              {

                  ArrayList.Add(input[i]);

              }

          }

          int[] NewArray = ArrayList.ToArray();

          return NewArray;

    }

    public static bool IsOddNumber(int num)

    {

        // % is a remainder operator. It will divide value of num variable by 2 and return the remainder,

        // because we are dividing by 2, the answer will be 0 or 1.

        // if remainder is 1, then it is an odd number)     

        int remainder = num % 2;

        // == is the compare operator

        if(remainder == 0)

        {

            return false;

        }

        else{

            return true;

        }

​

    }

    public static bool IsOddNumberInArray(int[] nums)

    {

        int lengthOfArray = nums.Length;

        for(int index=0; index<lengthOfArray; index++)

        {

            // array is a list of elements. We are going one by one element using a for loop

            // and we will lookup each element by its index.

            // Array index starts from 0 to number of Elements - 1(we subtract 1 because we started from 0

            // So if an array has { 2, 4, 5} , these three elements 

            // its length is 3 and it has 0,1,2

            int remainder = nums[index] % 2;

            // == is the compare operator

            if(remainder == 1)

            {

                return true;

            }

        }

        // if there had been any odd number in array, it would have been caught inside the for loop if condition

        // and function would have returned

        // if we have reached here, we did not find any odd number in array, so return false

        return false;

    }

}