Sum Method (IEnumerable(Double))

Enumerable.Sum Method (IEnumerable(Of Double))

 

Computes the sum of a sequence of Double values.

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

<ExtensionAttribute>
Public Shared Function Sum (
	source As IEnumerable(Of Double)
) As Double

Parameters

source
Type: System.Collections.Generic.IEnumerable(Of Double)

A sequence of Double values to calculate the sum of.

Return Value

Type: System.Double

The sum of the values in the sequence.

Exception Condition
ArgumentNullException

source is null.

This method returns zero if source contains no elements.

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

The following code example demonstrates how to use Sum(IEnumerable(Of Single)) to sum the values of a sequence.

System_CAPS_noteNote

This code example uses an overload of this overloaded method that is different from the specific overload that this topic describes. To extend the example to this topic, substitute the elements of the source sequence with elements of the appropriate numerical type.

' Create a list of Single values.
Dim numbers As New List(Of Single)(New Single() _
                                   {43.68F, 1.25F, 583.7F, 6.5F})

' Get the sum of values in the list.
Dim sum As Single = numbers.Sum()

' Display the output.
MsgBox("The sum of the numbers is " & sum)

' This code produces the following output:
'
' The sum of the numbers is 635.13

Universal Windows Platform
Available since 4.5
.NET Framework
Available since 3.5
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
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