Rot13 in F#

Welcome to the Rot13 in F# page! Here, you'll find the source code for this program as well as a description of how the program works.

Current Solution

open System

module Rot13 =
    let private rot13Char c =
        let shift baseLetter =
            char (((int c - int baseLetter + 13) % 26) + int baseLetter)

        if c >= 'a' && c <= 'z' then shift 'a'
        elif c >= 'A' && c <= 'Z' then shift 'A'
        else c

    let run = String.map rot13Char

module Helpers =
    let parseArgs =
        function
        | [| s |] when s <> "" -> Ok s
        | _ -> Error "Usage: please provide a string to encrypt"

    let handleResult =
        function
        | Ok s ->
            s |> Rot13.run |> printfn "%s"
            0
        | Error msg ->
            printfn "%s" msg
            1

[<EntryPoint>]
let main argv =
    argv |> Helpers.parseArgs |> Helpers.handleResult

Rot13 in F# was written by:

• Ștefan-Iulian Alecu

If you see anything you'd like to change or update, please consider contributing.

How to Implement the Solution

No 'How to Implement the Solution' section available. Please consider contributing.

How to Run the Solution

No 'How to Run the Solution' section available. Please consider contributing.