Multi Dimensional array in C#

The multi dimensional array in C# is such type of array that contains more than one row to store data on it. The multi dimensional array is also known as rectangular array in c sharp because it has same length of each row. It can be two dimensional array or three dimensional array or more. It contains more than one coma (,) within single rectangular brackets (“[ , , ,]”). To storing and accessing the elements from multidimensional array, you need to use nested loop in program. The following example will help you to figure out the concept of multidimensional array.

 Programming Example of multi dimensional array in C#:

using System;

namespace multi_dimensional_array
{
  class Program
   {
     static void Main(string[] args)
      {
        int i, j;
        //Declaring multi dimensional array
        string[,] Books = new string[3,3];
        for (i = 0; i < 3; i++)
         {
           for (j = 0; j < 3; j++)
            {
              Console.Write("\nEnter Book Name for {0}.Row and {1}. column:\t",i+1,j+1);
              Books[i,j] = Console.ReadLine();
            }
         }

        Console.WriteLine("\n\n=========================");
        Console.WriteLine("All the element of Books array is:\n\n");

        //Formatting Output
        Console.Write("\t1\t2\t3\n\n");
        //outer loop for accessing rows
        for (i = 0; i < 3; i++)
         {
           Console.Write("{0}.\t", i + 1);

           //inner or nested loop for accessing column of each row
           for (j = 0; j < 3; j++)
            {
              Console.Write("{0}\t", Books[i,j]);
            }
           Console.Write("\n");
         }
        Console.WriteLine("\n\n=========================");
        Console.ReadLine();
      }
   }
}

---

Output
 Enter Book Name for 1. Row and 1. column:      C#

Enter Book Name for 1. Row and 1. column:      JAVA

Enter Book Name for 1. Row and 1. column:      C++

Enter Book Name for 1. Row and 1. column:      C

Enter Book Name for 1. Row and 1. column:      VB.NET

Enter Book Name for 1. Row and 1. column:      C#.NET

Enter Book Name for 1. Row and 1. column:      XML

Enter Book Name for 1. Row and 1. column:      HTML

Enter Book Name for 1. Row and 1. column:      SQL

===============================================
All the element of Books array is:

       1       2              3

1.    C#     JAVA       C++
2.    C       VB.NET    C#.NET
3.    XML   HTML      SQL

===============================================
In the preceding example, we create a two dimensional array named Books which size is [3,3]. It means, this array has three rows and each rows contains three columns. Each row can be accessed using outer loop and each column of rows can be accessed using nested loop inside the outer loop as follow.

for (i = 0; i < 3; i++) //outer loop for accessing rows
 {
   Console.Write("{0}.\t", i + 1);

   //inner or nested loop for accessing column of each row
   for (j = 0; j < 3; j++)
    {
      Console.Write("{0}\t", Books[i,j]);
    }
   Console.Write("\n");
 }

---