Understanding concepts

[F GV]

Hi everyone,

I would like to understand clearly this concepts. I
have read about them but just want to confirm.
Thanks in advance.

What forward is for?
What recursion is for?



      ____________________________________________________________________________________
¡Capacidad ilimitada de almacenamiento en tu correo!
No te preocupes más por el espacio de tu cuenta con Correo Yahoo!:                      
http://correo.yahoo.com.mx/