Factorial of N

[lich]

I really dont know this Program is rite or wrong. but it wont give a answer. if anyone can help me in this

Public Class Form2
Dim num As Integer

Private Sub Form2_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim fact As Integer

num = Val(InputBox("Enter the Factorial Number"))

Do
fact = fact * num
num = num - 1

Loop Until num <= 0

MessageBox.Show(fact)

End Sub
End Class

[Jx_Man]

use this following function :

Public Function Factorial(ByVal Number As Integer) As String
        Try
            If Number = 0 Then
                Return 1
            Else
                Return Number * Factorial(Number - 1)
            End If
        Catch ex As Exception
            Return ex.Message
        End Try
    End Function

I called this function in button click event:

Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
       Dim num As Integer
        num = Val(InputBox("Enter the Factorial Number"))
        MsgBox(Factorial(num))
End Sub