Pattern > If example

PatternVsIf.fs

type Status = Active | Standby | Inactive

let status = Active
let isOnline = true

if not isOnline then
    printfn "Status is offline or inactive"
else
    match status with
    | Active -> "Status is active"
    | Standby -> "In Standby"
    | Inactive -> "Status is offline or inactive"
    |> printfn "%s"

// vs

printfn <|
    match isOnline, status with
    | false, _ | _, Inactive -> "Status is offline or inactive"
    | _, Active -> "Status is active"
    | _, Standby -> "In Standby"