JavaScript

Moderators: None (Apply to moderate this forum)
Number of threads: 2061
Number of posts: 5164

This Forum Only
Post New Thread
Single Post View       Linear View       Threaded View      f

Report
Re: newb question, experts plz come in Posted by zibadian on 21 Apr 2004 at 3:50 PM
: My first attempt to add two variables and output the result ended in failure.
: Example Code:
:
: var num1 = prompt("Number 1","Enter");
: var num2 = prompt("Number 2","Enter");
: 
: var num3 = num1 + num2;
: alert("Number 3 is "+num3);
: 

: When I entered (as an example) 10 for number 1, and 15 for number 2, 1015 was the result in the alert box.
:
: The second attempt was a success, where I created a function to add the two numbers:
:
: function AddValues(term1,term2)
: {
:     var returnvalue = term1;
:        
:     for(var i = 0; i < term2; i++)
:         {
:             returnvalue++;
:         }
:     return returnvalue;
: }
: 

: There may be stupid errors in my code but you get the idea. Now, in the first example, why does it output the numbers as compounded character arrays? Is it because every variable defaults to a char array? If so, how do I change this? I doubt something this basic requires workaround functions like in the second example. Thanks in advance.
:
:
The Prompt() function always results in a string, which means that both num variables will also be type-cast as strings. You can force javascript to make them integers, by adding 0 to, when creating the variables:
  var num1 = prompt("Number 1","Enter") + 0;

This way the addition will follow the numerical rules.
Thread Tree
wyz0020 newb question, experts plz come in on 21 Apr 2004 at 11:37 AM
zibadian Re: newb question, experts plz come in on 21 Apr 2004 at 3:50 PM
wyz0020 Re: newb question, experts plz come in on 23 Apr 2004 at 10:14 AM
Weirdofreak Re: newb question, experts plz come in on 24 Apr 2004 at 4:39 AM



 

Recent Jobs

Official Programmer's Heaven Blogs
Web Hosting | Browser and Social Games | Gadgets

Popular resources on Programmersheaven.com
Assembly | Basic | C | C# | C++ | Delphi | Flash | Java | JavaScript | Pascal | Perl | PHP | Python | Ruby | Visual Basic
© Copyright 2011 Programmersheaven.com - All rights reserved.
Reproduction in whole or in part, in any form or medium without express written permission is prohibited.
Violators of this policy may be subject to legal action. Please read our Terms Of Use and Privacy Statement for more information.
Operated by CommunityHeaven, a BootstrapLabs company.