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Showing content from https://fsharp.github.io/fsharp-core-docs/reference/fsharp-core-option-1.html below:

'T option (FSharp.Core) | FSharp.Core

Namespace: FSharp.Core

Assembly: FSharp.Core.dll

Abbreviation For: Option<'T>

Base Type: obj

All Interfaces: IStructuralEquatable , IComparable<Option<'T>> , IComparable , IStructuralComparable

The type of optional values. When used from other CLI languages the empty option is the null value.

Full Usage:

Returns: bool

Return 'true' if the option is a 'None' value.

Returns: bool

Full Usage:

Returns: bool

Return 'true' if the option is a 'Some' value.

Returns: bool

Full Usage:

Returns: 'T

Get the value of a 'Some' option. A NullReferenceException is raised if the option is 'None'.

Returns: 'T

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