Array.Rank Property

Gets the rank (number of dimensions) of the Array. For example, a one-dimensional array returns 1, a two-dimensional array returns 2, and so on.

Namespace:  System
Assembly:  mscorlib (in mscorlib.dll)

public int Rank { get; }

Property Value

Type: System.Int32
The rank (number of dimensions) of the Array.

For example, the Visual Basic code

Dim TDArray(0,0,0) As Integer

and the C# code

int[,,] TDArray = new int[1,1,1];

create an array of three dimensions with a Rank property whose value is 3.

A jagged array (an array of arrays) is a one-dimensional array; the value of its Rank property is 1.

Retrieving the value of this property is an O(1) operation.

The following example initializes a one-dimensional array, a two-dimensional array, and a jagged array, and retrieves the Rank property of each.

using System;

public class Example
{
   public static void Main()
   {
      int[] array1 = new int[10];
      int[,] array2= new int[10,3];  
      int[][] array3 = new int[10][]; 

      Console.WriteLine("{0}: {1} dimension(s)", 
                        array1.ToString(), array1.Rank);
      Console.WriteLine("{0}: {1} dimension(s)", 
                        array2.ToString(), array2.Rank);
      Console.WriteLine("{0}: {1} dimension(s)", 
                        array3.ToString(), array3.Rank);
   }
}
// The example displays the following output: 
//       System.Int32[]: 1 dimension 
//       System.Int32[,]: 2 dimension 
//       System.Int32[][]: 1 dimension

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

.NET for Windows Store apps

Supported in: Windows 8

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone Silverlight 8.1, Windows Phone Silverlight 8

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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