File APIs for Java Developers
Manipulate DOC, XLS, PPT, PDF and many others from your application.
The moose likes HTML, CSS and JavaScript and the fly likes JavaScript reverse integer (?) Big Moose Saloon
  Search | Java FAQ | Recent Topics | Flagged Topics | Hot Topics | Zero Replies
Register / Login

Win a copy of Java Interview Guide this week in the Jobs Discussion forum!
JavaRanch » Java Forums » Engineering » HTML, CSS and JavaScript
Bookmark "JavaScript reverse integer (?)" Watch "JavaScript reverse integer (?)" New topic

JavaScript reverse integer (?)

juhee kim

Joined: Sep 26, 2007
Posts: 1
I'm having difficulty writing a program that needs to compute 2-6 digits reversed. For instance: 12 = 21 1456 = 6541, etc. This is what I have so far. Any hints are greatly appreciated. Thank You. email:
<title> Homework #5 part1 </title>
<script language = "javascript">

function begin()
var num = new Array(); // unlimited elements array

int num[0] = parseInt(window.prompt("Please Enter 2- 6 digits number",""));

if ( num[0] < 10 || num[0] > 999999)
int num[0] = parseInt(window.prompt("Please Re-Enter 2-6 digits number",""));
var n;
n = StrReverse("");



<BODY><p> <h2> Click refresh to run it again </h2></p>
fred rosenberger
lowercase baba

Joined: Oct 02, 2003
Posts: 11957

We have a forums devoted to JavaScript. I'll move this thread to there for you. Check for any followups in that forum.

There are only two hard things in computer science: cache invalidation, naming things, and off-by-one errors
Stan James
(instanceof Sidekick)
Ranch Hand

Joined: Jan 29, 2003
Posts: 8791
Hi, welcome to the ranch! And the HTML & JavaScript forum!

If you're not familiar with the ranch, you'll find we give you hints and invite you to do all the real work. We try not to just do homework, or real work, for folks. So ... I could imagine doing this two ways.

One: make a string from your user input, work your way through it one character at a time and add each character to a new string. Google for JavaScript string functions and see what you find.

Two: find a JavaScript math function that will give you just the "ones column" of your number. Make that your new result. Divide the original number by 10 to remove that "ones" value and repeat. I left out a critical bit of output processing but you'll find it quickly enough.

The ranch works really well when you post some code that almost works, so take a shot at either or both of those and show us what you make!

A good question is never answered. It is not a bolt to be tightened into place but a seed to be planted and to bear more seed toward the hope of greening the landscape of the idea. John Ciardi
Bear Bibeault
Author and ninkuma

Joined: Jan 10, 2002
Posts: 63873

Please be sure to use UBB code tags when posting code to the forums. Please read this for more information.

[Asking smart questions] [About Bear] [Books by Bear]
subject: JavaScript reverse integer (?)
It's not a secret anymore!