ActionScript- array.length - 1?

[Tamilboy86]

var AmountPic:Number = 2;
var picList = new Array();
var currentElement:Number = 0;


for(i=0; i < AmountPic; i++ ) {
	var destination:String = "gal" + (i+1) + ".swf";
	picList.push(destination);
}

stuff_mc.loadMovie(picList[currentElement]);

neste.onRelease = function() {
	if (currentElement < picList.length-1) {
		currentElement++;
	}
	else {
		currentElement = 0;
	}
	stuff_mc.loadMovie(picList[currentElement]);
}

When I come to the last element in the index I want it to go to the first index again, thats what the code in "neste.onRelease = function()" do. But i don't understand the first part with

if (currentElement < picList.length-1) {
		currentElement++;
	}

picList.length-1.. why "-1" ?

thx

[rpgfan]

Arrays start at 0 in most programming languages. If you have an array of 3 elements, you have 3 positions available - positions 0, 1 and 2. As a result, fetching the length would return 3, so you need to subtract 1 to get the last element, the element at position 2.

[:: Lyon ::]

As rpgfan said! It can get confusing sometimes if you're not used to programming!

[Tamilboy86]

thx alot...that cleared my confusion.. :D

[barkerja]

I think all languages zero index... except for databases.

[+Majesticmerc MVC]

I think all languages zero index... except for databases.

The original VB allowed you to create arrays that started at 1 too. Don't know about VB.NET, but I would assume not.