F# Create a module

https://dotnetfiddle.net/

module LeandroMathFuncs =
   
    type Pair = {X : int; Y : int}
   
    let createPair x y =
        { X = x; Y = y}
   
    /// This adds two integers together!!!
    let addPair pair =
        pair.X + pair.Y
   
    let add x y =
        x + y
       
    let incrementByOne x =
        x + 1
   
    let incrementByOneImp =
        // Code reuse of add function using partial application
        add 1  

module L = LeandroMathFuncs

let myPair = L.createPair 1 2

printfn "Result 1 + 2 = %i" (L.createPair 1 2 '> L.addPair)
printfn "Result incremented by 1 = %i" (LeandroMathFuncs.incrementByOne 2) 
printfn "Result incremented by 1 using add function = %i" (LeandroMathFuncs.incrementByOneImp 2)

open LeandroMathFuncs
printfn "Same result %b" ((incrementByOne 5) = (incrementByOneImp 5))