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Seq.length<'T> Function (F#)

Returns the length of the sequence

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

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

// Signature:
Seq.length : seq<'T> -> int

// Usage:
Seq.length source


Type: seq<'T>

The input sequence.




Thrown when the input sequence is null.

The length of the sequence.

This function is named Length in compiled assemblies. If you are accessing the function from a language other than F#, or through reflection, use this name.

The following code shows how to use Seq.length.

let table1 = seq { for i in 1 ..10 do 
                      for j in 1 .. 10 do 
                          yield (i, j, i*j)
Seq.length table1 |> printfn "Length: %d"


Length: 100

Windows 8, Windows 7, Windows Server 2012, Windows Server 2008 R2

F# Core Library Versions

Supported in: 2.0, 4.0, Portable

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