Is the purpose of Length to declare how many values(things) are in the course(the example)/category?

Question

not sure if i asked the question right.

Answer 1

I think U r asking about array in js

Array is nothing but a kind of object
&
'length' is a built-in property of array

length property simply returns the count (nos.) of elements in an array

Answer 2

length is a property of objects and strings.

.length default is 0.

var arraySample = ["obj1","obj2"];

alert(arraySample.length); returns 2
var placeholder = "";
for(var i =0; i < arraySample.length;i++){placeholder+=arraySample[i]; alert(placeholder);} will count the length of the array and iterate until i is no longer less than the array's length.

var thisString = "this is a string.";

alert(thisString.length); returns 16 as there are 16 characters including whitespace.

Answer 3

I am just now starting Intro to Java in college, but what I gather is the length method counts the characters in the named variable in the system.out.print/println argument.