open System

let num = 42
let rnd = new Random()
let str = "Hellow world"

/// Adds one
let addOne number =
    printfn "Adding..."
    number + 1.0

let nextRandom (rnd:Random) =
    rnd.Next()

// this is a function
let sayHello () =
    let msg = "Hello"
    let msg = msg + " World"
    let msg = msg + "!"

    printfn "%s" msg

// this is a variable
let sayHello2 =
    let msg = "Hello"
    let msg = msg + " World"
    let msg = msg + "!"

    printfn "%s" msg



type Person =
    {Age:int}
    static member (*) (p:Person, n:int) =
        { Age = p.Age * n}

let phil = ("Phil", 21)

let inline square x = x * x


// Tuple<T, int> IncrementAge<T>(Tuple <T, int>)
let incrementAge person =
    let name, age = person
    (name, age + 1)

let incrementAgeSeparate (name) age =
    (name, age + 1)

let incrementAgeTuple (name, age) =
    (name, age + 1)

incrementAgeTuple phil

incrementAgeSeparate "Thomas" 12