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

Returns the length of an array.

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

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

// Signature:
Array.length : 'T [] -> int

// Usage:
Array.length array

Parameters

  • array
    Type: 'T []

    The input array.

Return Value

The length of the array.

Remarks

You can also use property Length.

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 example demonstrates how to use Array.length.

Array.length [| 1 .. 100 |] |> printfn "Length: %d"
Array.length [| |] |> printfn "Length: %d"
Array.length [| 1 .. 2 .. 100 |] |> printfn "Length: %d"

Output

Length: 100
Length: 0
Length: 50

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.Array Module (F#)

Microsoft.FSharp.Collections Namespace (F#)