I have been learning Asterisk dial plan for the past week.I have written down a simple IVR system with two levels of menu and an exit option.I have used concepts from different tutorials on the web.Can someone confirm if the IVR below is correct? Correct in the sense that if the below is used will it work.I know the IVR does not do much yet.But I am just trying to clarify my understanding.

[incoming]
exten => 123,1,Answer()
 same => n(menuprompt),Background(main-menu)

exten => 1,1,Playback(digits/1)
 same => n,Goto(incoming,menuprompt,123)

exten => 2,1,Playback(digits/2)
 same => n,Goto(incoming,menuprompt,123)

exten => 9,1,Hangup()

[main-menu]
exten => n(menuprompt),Background(main-menu)

exten => 3,1,Playback(digits/3)
 same => n,Goto(main-menu,menuprompt,n)

exten => 4,1,Playback(digits/4)
 same => n,Goto(main-menu,menuprompt,n)

exten => 9,1,Hangup()