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JavaScript reverse integer (?)

juhee kim
Greenhorn

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: j0kim025@uofl.edu
/*
<HTML>
<Head>
<title> Homework #5 part1 </title>
<script language = "javascript">

function begin()
{
var num = new Array(); // unlimited elements array
window.alert("work");

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("");

document.writeln(n);

}


</script>
</head>
<BODY><p> <h2> Click refresh to run it again </h2></p>
</body>
</html>*/
fred rosenberger
lowercase baba
Bartender

Joined: Oct 02, 2003
Posts: 11480
    
  16

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
Marshal

Joined: Jan 10, 2002
Posts: 61662
    
  67

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


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