How do we use multi-dimensional arrays in C#?

C# allows multidimensional arrays. Multi-dimensional arrays are also called rectangular array. Declare a 2-dimensional array of strings as.

string [,] names;

A 2-dimensional array can be thought of as a table, which has x number of rows and y number of columns.

Multidimensional arrays may be initialized by specifying bracketed values for each row. The following array is with 4 rows and each row has 4 columns.

int [,] a = new int [4,4] {
   {0, 1, 2, 3} , /* initializers for row indexed by 0 */
   {4, 5, 6, 7} , /* initializers for row indexed by 1 */
   {8, 9, 10, 11} /* initializers for row indexed by 2 */
   {12, 13, 14, 15} /* initializers for row indexed by 3 */
};

Let u see an example to learn how to work with multi-dimensional array in C#.

Example

 Live Demo

using System;
namespace Program {
   class Demo {
      static void Main(string[] args) {
         /* an array with 5 rows and 2 columns*/
         int[,] a = new int[5, 2] {{0,0}, {1,2}, {2,4}, {3,6}, {4,8} };
         int i, j;
         /* output each array element's value */
         for (i = 0; i < 5; 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
a[3,0] = 3
a[3,1] = 6
a[4,0] = 4
a[4,1] = 8