Solution: Search in a 2D Array

using System;
class Program
{
    /// <summary>
    /// A method to find a number in a 2D array.
    /// </summary>
    /// <param name="arr">A 2D array of integers.</param>
    /// <param name="number">A number to be searched in the 2D array.</param>
    /// <returns>True if the number is found, otherwise False.</returns>
    public static bool FindIn(int[][] arr, int number)
    {
        int numRows = arr.Length;
        int numCols = arr[0].Length;
        for (int i = 0; i < numRows; i++) // Number of rows
        {
            for (int j = 0; j < numCols; j++) // Number of cols
            {
                if (arr[i][j] == number)
                {
                    return true; // If number is found
                }
            }
        }
        return false; // If number is not found
    }
    // Driver to test above code
    static void Main()
    {
        int[][] array = new int[][]
        {
            new int[] { 10, 11, 12, 13 },
            new int[] { 14, 15, 16, 17 },
            new int[] { 27, 29, 30, 31 },
            new int[] { 32, 33, 39, 50 }
        };
        // Example 1
        Console.WriteLine(FindIn(array, 30));
        // Example 2
        Console.WriteLine(FindIn(array, 100));
    }
}