The next language I'll be learning will be F#. I just started and have already written my first stack overflow! But it taught me a lesson about the order of precedents in F#.

I was writing my first real function, one that wasn't pre-written in the tutorials I was using (at least not that I got up to yet!): Fibonacci. I started with

```
let rec fib x =
if x = 0 then
0
elif x = 1 then
1
else
(fib x-1)+(fib x-2)
printfn "fib 10 is %A" (fib 10)
```

and that crashed the interpreter! can you spot the problem?

line 7 does this:

- compute fib x
- subtract 1 from that
- compute fib x
- subtract 2 from that
- add the two together

I should have written

```
fib(x-1) + fib(x-2)
```

I'm learning here!

The next step, using match patterns instead of if's. And Matthew Podwysocki's got a great write up of that over here! Too bad he solved my Fibonacci problem. Now I'll have to come up with another problem to really learn the language. Any suggestions?