How to declare a two-dimensional array in C#

A 2-dimensional array is a list of one-dimensional arrays. Declare it like the two dimensional array shown below −

int [,] a

Two-dimensional arrays may be initialized by specifying bracketed values for each row.

int [,] a = new int [4,4] { {0, 1, 2, 3} , {4, 5, 6, 7} , {8, 9, 10, 11} , {12, 13, 14, 15} };

The following is an example showing how to work with two-dimensional arrays in C# −

Example

 Live Demo

using System; namespace ArrayApplication {    class MyArray {       static void Main(string[] args) {          /* an array with 3 rows and 2 columns*/          int[,] a = new int[3, 2] {{0,0}, {1,2}, {2,4} };          int i, j;          /* output each array element's value */          for (i = 0; i < 3; i++) {             for (j = 0; j < 2; j++) {                Console.WriteLine("a[{0},{1}] = {2}", i, j, a[i,j]);             }          }          Console.ReadKey();       }    } }

Output

a[0,0] = 0 a[0,1] = 0 a[1,0] = 1 a[1,1] = 2 a[2,0] = 2 a[2,1] = 4