Use "n - 1I".
1 2
let rec factorial (n:bigint) : bigint = if n=0I then 1I else n*factorial(n - 1I)
Kind regards
Don
Doh! Of course. It wasn't clear to me from the error message, but now that you point out my mistake, it's quite obvious. Thanks!
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I'm having difficulty writing a recursive bigint function. For example,
let rec factorial (n:bigint) : bigint = if n=0I then 1I else n*factorial(n-1)
does not work. I get strange type errors saying that something in here is type int, rather than bigint. Any suggestions?