can function call it self then how explain

[Ram9820]

can function call it self then how explain

[C CSR]

Yes. Its called "Recursion, " and if you don't have a way to end it you will crash--loops until your out of memory. I'd give you an example but you didn't say what language you're using.

[C CSR]

Here's a basic example I snatched from a helpfile in MSAccess. Just adapt the concept to your code. Watch the output; it climbs up through the repeated function calls, then backs back down when it hits a certain condition. Step through it to fully understand the action & results of your variables.

Function Factorial(N)
    If N <= 1 Then    ' Reached end of recursive calls.
        Factorial = 1    ' (N = 0) so climb back out of calls.
    Else    ' Call Factorial again if N > 0.
        Debug.Print "FuncN =" & N
        Factorial = Factorial(N - 1) * N
    End If
End Function