Question about WHILE/FOR Loops

[mdude85]

Say I am writing a code like so:

Var[0] = 0
Var[1] = 1
Var[2] = 2

And I want to output the variables with a while loop so that they are output in a document.write(Var+'<br>') but that they stop outputting depending on the number in the Var[] brackets IF the number is NOT static -- that is the user can choose to add to Var[] (Var[3], Var[4]) but doesn't need to update the while loop (while (i<...). Is there any way for the script to determine the numbers inside the brackets by itself and then break once that number has been reached? Thanks.

 

[kaht]

1. You shouldn't name your variable "Var" - var is a reserved keyword in javascript and could cause problems. It's probably better to choose a more descriptive variable name depending on what it is they are storing.

2. Every array has a .length value, this determines how many elements are in the array. If you wanted to output your array from above you'd do it like this:

<script type="text/javascript">

var myArray = new Array();
myArray[0] = 0;
myArray[1] = 1;
myArray[2] = 2;

for (var i = 0; i < myArray[!].length[/!]; i++) {
   document.write("value in element " + i + ": " + myArray[i] + "<br>");
}
</script>

-kaht

[small]How spicy would you like your chang sauce? Oh man... I have no idea what's goin' on right now...[/small]

 

[mdude85]

Thanks, the .length value is a really big help. However, when I run my script, the value corresponding to myArray[0] is left off (only the values in [1] and [2] are printed). If I start i = 0, shouldn't the [0] value be printed? Thanks.

 

[mdude85]

Oops, nevermind, I think I fixed it. I removed the i++ right after my document.write in the for loop that I had included from another test code. I appreciate your help!