Seq.sum<^T> Function (F#)

Returns the sum of the elements in the sequence.

Namespace/Module Path: Microsoft.FSharp.Collections.Seq

Assembly: FSharp.Core (in FSharp.Core.dll)

// Signature:
Seq.sum : seq<^T> -> ^T (requires ^T with static member (+) and ^T with static member Zero)

// Usage:
Seq.sum source


  • source
    Type: seq<^T>

    The input sequence.

Return Value

The sum of the elements of the sequence.


The elements are summed using the + operator and Zero property associated with the generated type.

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.


Windows 7, Windows Vista SP2, Windows XP SP3, Windows XP x64 SP2, Windows Server 2008 R2, Windows Server 2008 SP2, Windows Server 2003 SP2

Version Information

F# Runtime

Supported in: 2.0, 4.0


Supported in: 3

See Also


Collections.Seq Module (F#)

Microsoft.FSharp.Collections Namespace (F#)