GetPlayerId(p) Why do sometimees do i have to add +1 to work?

[Time]

I was wondering why do I have to add +1 next to GetPlayerId(p) to work? Can you tell me so I'll know when to put the +1..

 

[TheLegend]

GetPlayerId() gets the jass id of the player where Player one's id is 0
to get it work as the GUI version just use this
GetConvertedPlayerId(p)
that will get the gui player id where Player one's id is 1

 

[Time]

The thing is im trying to stay away from gui.. thats why always use this
local player p = GetTriggerPlayer()
local integer i = GetPlayerId(p)+1

 

[RedOrb]

You should get used to the first element being 0. Applies to all arrays.

 

[Inflicted]

GUI just makes it simpler by adding the extra one.
In GUI: Players are 1-12
in Jass: Players are 0-11
(with the exception of neutrals etc)

If you convert the default GUI code you will see that the interface automatically adds the 1 to make it more user-friendly.
Basically its always 0-11, in the cases of Player Numbers and Arrays; as mentioned above.

If you are going to continue working in Jass, just try and remember to almost always use 0-11.