Map.Item<'Key,'Value> Property (F#)

Lookup an element in the map. Raise KeyNotFoundException if no binding exists in the map.

Namespace/Module Path: Microsoft.FSharp.Collections

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

// Signature:
member this.Item ('Key) : 'Value (requires comparison)

// Usage:
map.[key]

Parameters

• key
  Type: 'Key

  The input key.

Exceptions

Return Value

The value mapped to the key.

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.Map<'Key,'Value> Class (F#)

Microsoft.FSharp.Collections Namespace (F#)