How can I refactor out the required else clause?

Question

I have a C# method that looks a bit like this:

bool Eval() {
  // do some work
  if (conditionA) {
     // do some work
     if (conditionB) {
       // do s         


        

Answer 1

Well, since 'do some work' is already imperative (presumably), then I think that

let eval() =
    let mutable result = false
    ... // ifs
        result <- true
    ... // no more elses
    result

is shorter and reasonable. (In other words, else is only mandatory for if expressions that return values; since you're doing imperative work, use if statements that don't need an else.)