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

Parameters

• source
  Type: seq<'T>

  The input sequence.

Exceptions

Return Value

The length of the sequence.

Remarks

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.

Example

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"

Output

Length: 100

Platforms

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

Silverlight

Supported in: 3

See Also

Reference

Collections.Seq Module (F#)

Microsoft.FSharp.Collections Namespace (F#)