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Enumerable.Average Method (IEnumerable(Of Int32))

Computes the average of a sequence of Int32 values.

Namespace:  System.Linq
Assembly:  System.Core (in System.Core.dll)

<ExtensionAttribute> _
Public Shared Function Average ( _
	source As IEnumerable(Of Integer) _
) As Double


Type: System.Collections.Generic.IEnumerable(Of Int32)
A sequence of Int32 values to calculate the average of.

Return Value

Type: System.Double
The average of the sequence of values.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IEnumerable(Of Int32). When you use instance method syntax to call this method, omit the first parameter.


source is Nothing.


source contains no elements.

In Visual Basic query expression syntax, an Aggregate Into Average() clause translates to an invocation of Average.

The following code example demonstrates how to use Average(IEnumerable(Of Int32)) to calculate an average.

      ' Create a list of integers.
      Dim grades As New List(Of Integer)(New Integer() {78, 92, 100, 37, 81})

      ' Determine the average value in the list.
      Dim avg As Double = grades.Average()

      ' Display the output.
      outputBlock.Text &= "The average grade is " & avg & vbCrLf

      ' This code produces the following output:
      ' The average grade is 77.6


Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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