6> CREATE PROC spFactorial
7> @ValueIn int,
8> @ValueOut int OUTPUT
9> AS
10> DECLARE @InWorking int
11> DECLARE @OutWorking int
12> IF @ValueIn != 1
13> BEGIN
14> SELECT @InWorking = @ValueIn - 1
15>
16> EXEC spFactorial @InWorking, @Outworking OUTPUT
17>
18> SELECT @ValueOut = @ValueIn * @OutWorking
19> END
20> ELSE
21> BEGIN
22> SELECT @ValueOut = 1
23> END
24> RETURN
25> GO
1>
2>
3> DECLARE @WorkingOut int
4> DECLARE @WorkingIn int
5> SELECT @WorkingIn = 5
6> EXEC spFactorial @WorkingIn, @WorkingOut OUTPUT
7>
8> PRINT CAST(@WorkingIn AS varchar) + " factorial is " + CAST(@WorkingOut AS varchar)
9> GO
5 factorial is 120
1>
2> drop PROC spFactorial;
3>GO
