List.Cons<'T> Method (F#)

Returns a list with head as its first element and tail as its subsequent elements.

Namespace/Module Path: Microsoft.FSharp.Collections

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

// Signature:
static member List.Cons : 'T * 'T list -> 'T list

// Usage:
List.Cons (head, tail)

Parameters

• head
  Type: 'T

  A new head value for the list.

• tail
  Type: 'T list

  The existing list.

Return Value

The list with head appended to the front of tail.

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

See Also

Reference

Collections.List<'T> Union (F#)

Microsoft.FSharp.Collections Namespace (F#)