Units of measure in F#

Question

Hiii can anyone tell me? How are units of measure represented in F#? Thanks in advance

Vulpes · Answer

To define a unit of measure in F# you need to add the [ ] attribute before a type declaration. You can then qualify an appropriate numeric value with a unit of measure (by enclosing it within ) so that it will only work with that particular unit of measure. For example: [ ] type celsius let printTemperature(temp : float ) = // temp must be a float with unit of measure 'celsius' if temp = -273.15 then printfn Absolute zero elif temp then printfn Below freezing elif temp = 0.0 then printfn Freezing point elif temp then printfn Above freezing elif temp = 100.0 then printfn Boiling point else printfn Above boiling let temp = 30.0 printTemperature temp // Above freezing let temp2 = -273.15 printTemperature temp2 // Absolute zero