11.08.2016, 18:42
"Number of arguments" is literally counting the number of arguments - the things between the brackets - to see if that number matches up with the number of arguments in the function protoype. If you don't know what the prototype is, find a reference. Like https://sampwiki.blast.hk/wiki/GetPlayerInterior and https://sampwiki.blast.hk/wiki/GetPlayerVirtualWorld