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Option.isNone<'T> Function (F#)

  • Article

Returns true if the option is None.

Namespace/Module Path: Microsoft.FSharp.Core.Option

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

// Signature:
isNone : 'T option -> bool

// Usage:
isNone option

Parameters

  • option
    Type: 'T option

    The input option.

Return Value

true if the option is None.

Remarks

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

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

Core.Option Module (F#)

Microsoft.FSharp.Core Namespace (F#)