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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: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

XNA Framework

Supported in: 3.0, 2.0, 1.0

Portable Class Library

Supported in: Portable Class Library

Supported in: Windows Phone 8.1

Supported in: Windows Phone Silverlight 8.1

Supported in: Windows Phone Silverlight 8
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