Solution: Find the Closest Number

using System;
public class Program
{
    /// <summary>
    /// Finds the closest number to the target in the array.
    /// </summary>
    /// <param name="arr">Sorted array of integers.</param>
    /// <param name="target">Target integer.</param>
    /// <returns>The closest element from the array to the target.</returns>
    public static int FindClosest(int[] arr, int target)
    {
        int closest = Math.Abs(arr[0] - target);  // Closest absolute difference 
        int index = 0;  // Array index number
        for (int i = 0; i < arr.Length; i++)  // Traversing the whole array
        {
            if (Math.Abs(arr[i] - target) <= closest)  // Is there any number more closest?
            {
                closest = Math.Abs(arr[i] - target);  // Saving the new closest number
                index = i;  // Saving the index of the array
            }
        }
        return arr[index];  // Returning the result
    }
    // Driver code to test above method
    public static void Main(string[] args)
    {
        Console.WriteLine(FindClosest(new int[] { -9, -4, -2, 0, 1, 3, 4, 10 }, 5));
        Console.WriteLine(FindClosest(new int[] { 1, 2, 5, 10, 23, 25, 30, 50 }, 100));
    }
}