C# program to Loop over a two dimensional array

Declare a two dimensional array −

string[,] array = new string[3, 3];

Set elements in the array −

array[0, 0] = "One";
array[0, 1] = "Two";
array[0, 2] = "Three";
array[1, 0] = "Four";
array[1, 1] = "Five";
array[1, 2] = "Six";
array[2, 0] = "Seven";
array[2, 1] = "Eight";
array[2, 2] = "Nine";

Now, get the upper bound to get the dimensions to loop over the array −

int uBound0 = array.GetUpperBound(0);
int uBound1 = array.GetUpperBound(1);

Iterate through a nested loop, until the above two values as shown in the code below −

Example

 Live Demo

using System;
using System.Collections.Generic;
using System.Linq;
public class Demo {
   public static void Main() {
      string[,] array = new string[3, 3];
      array[0, 0] = "One";
      array[0, 1] = "Two";
      array[0, 2] = "Three";
      array[1, 0] = "Four";
      array[1, 1] = "Five";
      array[1, 2] = "Six";
      array[2, 0] = "Seven";
      array[2, 1] = "Eight";
      array[2, 2] = "Nine";
      // getting upper bound
      int uBound0 = array.GetUpperBound(0);
      int uBound1 = array.GetUpperBound(1);
      for (int i = 0; i <= uBound0; i++) {
         for (int j = 0; j <= uBound1; j++) {
            string res = array[i, j];
            Console.WriteLine(res);
         }
      }
      Console.ReadLine();
   }
}

Output

One
Two
Three
Four
Five
Six
Seven
Eight
Nine