Hello and welcome to our community! Is this your first visit?
Register
Enjoy an ad free experience by logging in. Not a member yet? Register.
Results 1 to 3 of 3
  1. #1
    New to the CF scene
    Join Date
    Jun 2017
    Posts
    3
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Rounding off numbers using Javascript

    Hello, looking for some help if possible as whatever solution I try isnt working, and this is probably something so simple but its driving me up the wall now!

    I have the following script:

    Code:
    calculate = function()
    {
        var textInput = document.getElementById('textInput').value;
        var textInput2 = document.getElementById('textInput2').value;
        document.getElementById('Total1').value = parseInt(textInput)/parseInt(textInput2)/12;
        document.getElementById('Total2').value = parseInt(textInput)/100*103.83;
       }
       
    function show_value2(x)
    {
     document.getElementById("slider_value2").innerHTML=x;
    }
    
    function show_value3(x)
    {
     document.getElementById("slider_value3").innerHTML=x;
    }
    This basically takes 2 numbers (divides one by the other, and then adds 3.83% onto the final output). Its for a home owners loan calculator. See here: Home | Riverlight Finance

    I need to round these numbers up though (so this: 9723.538461538461 becomes this: 9723)

    Thank you

  2. #2
    New to the CF scene
    Join Date
    Apr 2017
    Posts
    4
    Thanks
    1
    Thanked 0 Times in 0 Posts
    The code I try:
    Code:
      
    
    <script type="text/javascript">
    
    // 9723.538461538461 becomes this: 9723
    
    var n = 9723.538461538461;
    
    var s= String(n);
    alert(s[0]); // 9
    
    var A = [ ];
    for(var i=0; s[i] != "."; i++) {
    A[i] = s[i];
    }
    alert(A);//9,7,2,3
    
    var t = A.join("");
    // alert( t ); // 9723
    // alert(typeof(t));// string
    t = Number(t); 
    // alert(typeof(t)); // number
    // alert(t +4); // 9727
    
    </script>

  3. #3
    Senior Coder deathshadow's Avatar
    Join Date
    Feb 2016
    Location
    Keene, NH
    Posts
    2,068
    Thanks
    2
    Thanked 297 Times in 287 Posts
    What you are looking for is Math.round. Parseint is a truncate -- equivalent to Math.floor

    Also do you REALLY mean to truncate the user input?

    but yeah, Math.round(1.56) gives you 2.

    It's important to know all three: Math.round, Math.floor, and Math.ceil (ceiling)

    Math.round(1.001) == 1
    Math.round(1.5) == 2
    Math.round(1.999) == 2

    Math.floor(1.001) == 1
    Math.floor(1.5) == 1
    Math.floor(1.999) == 1

    Math.ceil(1.001) == 2
    Math.ceil(1.5) == 2
    Math.ceil(1.999) == 2
    I would rather have questions that can't be answered, than answers that can't be questioned.
    http://www.cutcodedown.com


 

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •