Scripter Javascript Tutorial

47 Get Information About an Array

Because arrays are objects, more information can be learned about them than with the previously covered data types (more on objects will come later in this tutorial). Arrays are effectively lists, so the length property is used to get how many objects are in the array. What is important to remember is that while array indexes start with 0, the count of values in the array with length will begin with 1 and is counted the way a person would.

var scale = [69, 71, 72];
var length = scale.length; // 3