Why “do…while” does not exist in F#

Question

I cannot find \"do...while...\"

I have to code like this:

let bubbleSort a=
    let n = Array.length a
    let mutable swapped = true
    let mutable i =         


        

Answer 1

do/while is not available because F# is a functional language and this kind of construct is specific to imperative languages.

break/continue is also not available for the same reasons.

However, you can still write do/while in F#. The following code blocks are equivalent :

in C#

do
{
    System.Console.WriteLine("processing something...");
    System.Console.WriteLine("doing something complicated");

    System.Console.Write("continue?");
} while (Console.ReadLine() == "y");

in F#

let doSomethingAndContinue() =
  printfn "processing something..."
  printfn "doing something complicated"
  printf  "continue?"
  System.Console.ReadLine()="y"

while doSomethingAndContinue() do ignore None