# Factorial in F#

Example for versions
fsharp 2.0.0

This example uses recursive definition of factorial, expressed in procedural paradigm.

`factorial`

defines the actual factorial-calculating routine, and `printFact`

defines the routine that outputs calculated factorials in required format.

```
let rec factorial n =
match n with
| 0 -> 1
| _ -> n * factorial (n - 1)
let rec printFact n =
match n with
| 0 -> printfn "0! = 1"
| _ -> printFact (n-1)
printfn "%d! = %d" n (factorial (n))
printFact(16)
```

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