List.sum<^T> Function (F#)
Returns the sum of the elements in the list.
Namespace/Module Path: Microsoft.FSharp.Collections.List
Assembly: FSharp.Core (in FSharp.Core.dll)
// Signature:
List.sum : ^T list -> ^T (requires ^T with static member (+) and ^T with static member Zero)
// Usage:
List.sum list
Parameters
list
Type: ^TlistThe input list.
Return Value
The resulting sum.
Remarks
This function is named Sum in compiled assemblies. If you are accessing the function from a language other than F#, or through reflection, use this name.
Example
The following code example illustrates the use of List.sum, List.sumBy, and List.average.
// Compute the sum of the first 10 integers by using List.sum.
let sum1 = List.sum [1 .. 10]
// Compute the sum of the squares of the elements of a list by using List.sumBy.
let sum2 = List.sumBy (fun elem -> elem*elem) [1 .. 10]
// Compute the average of the elements of a list by using List.average.
let avg1 = List.average [0.0; 1.0; 1.0; 2.0]
printfn "%f" avg1
Output
1.000000
Platforms
Windows 8, Windows 7, Windows Server 2012, Windows Server 2008 R2
Version Information
F# Core Library Versions
Supported in: 2.0, 4.0, Portable