Round to two decimal places

[jalley06]

Update: The below code is now working but I need a way to round the value in Text155 to only two decimal places. Can someone help?

Hi, I have a javascript function that is returning NaN in Text155 field. Can someone tell me what I'm doing wrong? If you haven't already guessed, I am also new to the Javascript world. Thanks!

<script language="Javascript">
    function sum()
        {
            document.form1.Text155.value = (parseInt(document.form1.Text52.value) + parseInt(document.form1.Text53.value) + parseInt(document.form1.Text54.value) + parseInt(document.form1.Text55.value) + parseInt(document.form1.Text56.value));
            return false;
        }
 
function FP_callJS() {//v1.0
 eval(arguments[0]);
}
</script>
 

[gits]

hi ...

you may use:

var val = 58.567;
 
// round val to two decimals
var res = Math.round(val*100)/100;
 
// res is now 58.57

kind regards

[jalley06]

hi ...

you may use:

var val = 58.567;
 
// round val to two decimals
var res = Math.round(val*100)/100;
 
// res is now 58.57

kind regards

Sorry for being a pain but could you show me in my code above where to put this? Thanks.

[gits]

let me give you an example for how to do that :)

<script type="text/javascript">
function get_sum() {
    var frm  = document.form1;
    var outp = frm.Text155.value;
    var res  = 0;
 
    for (var i = 2; i < 7; i++) {
        res += parseInt(frm['Text5' + i].value, 10);
    }
 
    outp = Math.round(res*100)/100;
 
    return false;
}
</script>
 

kind regards

[jalley06]

Got it...you're the best. Thank you.

[gits]

no problem ... glad to hear you got it working ... post back to the forum anytime you have more questions :)

kind regards

[acoder]

hbella, you posted this using the Report button:

hi gits
i need to change fields into R 000,000,000.00 but for the display, data
patterns i use ($Z,Z9.99) but after execution it allows/ outputs only
four digits.pls help!!
greeting and thanx

Please use the Reply link/button in future (the one to the far right). Thanks.

[hback]

I am very new to this. I'm working on a website: http://www.nhtpc.com/tools.htm where i'm trying to get the calculations to round to 2 decimal places where as right now it's showing 10.

Below is the code i'm using:

<form>
                  <table width="98%" border="0" cellpadding="0" cellspacing="0">
                    <tr>
                      <td width="36%"><div align="right">Degrees F:&nbsp;</FONT>
                          <input type="text" name="F" value="32"
    onchange="C.value = 100/(212-32) * (this.value - 32 )" />
                      </div></td>
                      <td width="43%" align="right">to Degrees C:&nbsp;</FONT>
                        <input name="C" type="text"
    onchange="F.value = (212-32)/100 * this.value + 32 " value="0.0" /></td>
                      <td width="21%">&nbsp;</td>
                    </tr>
                  </table>
                  </form>

Any suggestions would be much appreciated.

[gits]

in case you always want to display the 2 decimals, then you may use the toFixed() method ...

kind regards

[hback]

Thank you for your reply. Where do I paste this? ...and do I paste this entire block?

var n = 12345.6789;
 
n.toFixed();              // Returns 12346: note rounding, no fractional part
n.toFixed(1);             // Returns 12345.7: note rounding
n.toFixed(6);             // Returns 12345.678900: note added zeros
(1.23e+20).toFixed(2);    // Returns 123000000000000000000.00
(1.23e-10).toFixed(2)     // Returns 0.00

Thank You!

[Dormilich]

you do not paste this code block. that's just for demonstration how to use it.

another example:

var n = 10.234;
var x = n.toFixed(2);   // x is now 10.23

[hback]

I greatly appreciate everyone who has posted for this topic, but I don't even know enough to know what to do with that.

Thanks for your time.

[gits]

you need to do something like this:

F.value = ((212-32)/100 * this.value + 32).toFixed(2);

[hback]

Thank You gits..

I believe I am still doing something wrong. It not rounding up, and it's still giving me lots of numberes after the decimal. Please see code below.

<form>
                  <table width="98%" border="0" cellpadding="0" cellspacing="0">
                    <tr>
                      <td width="36%"><div align="right">Degrees F:&nbsp;</FONT>
                          <input type="text" name="F" value="32"
    onchange="C.value = 100/(212-32) * (this.value - 32 ) .toFixed(2);" />
                      </div></td>
                      <td width="43%" align="right">to Degrees C:&nbsp;</FONT>
                        <input name="C" type="text"
    onchange="F.value = ((212-32)/100 * this.value + 32).toFixed(2);"  /></td>
                      <td width="21%">&nbsp;</td>
                    </tr>
                  </table>
                  </form>

[gits]

is it in the C-field (line 6 in your above code)? you need to set the brackets like in the example ...

kind regards

[hback]

Ok some of this worked. It works from C Degrees to F Degrees, but not the other way around. Could you tell me what I'm doing wrong in the first half of this code?

<form>
                  <table width="98%" border="0" cellpadding="0" cellspacing="0">
                    <tr>
                      <td width="36%"><div align="right">Degrees F:&nbsp;</FONT>
                          <input type="text" name="F" value="32"
    onchange="C.value = 100/(212-32) * (this.value - 32).toFixed(2); " />
                      </div></td>
                      <td width="43%" align="right">to Degrees C:&nbsp;</FONT>
                        <input name="C" type="text"
    onchange="F.value = ((212-32)/100 * this.value + 32).toFixed(2); " value="0.0" /></td>
                      <td width="21%">&nbsp;</td>
                    </tr>
                  </table>
                  </form>

Thank You!

[gits]

as i said, the brackets are the problem:

C.value = (100/(212-32) * (this.value - 32)).toFixed(2);

[hback]

Thank You! It works perfectly. I appreciate your time and patience with me. I wasn't sure where to put the second bracket on the first half of the code.

[gits]

as you should see now, that you have to set the brackets according to the value that you want to have 'Fixed' ... the toFixed() method is used on numeric-values and casts the value to a string with the passed number of decimals ...

[hback]

I understand now. Thank you for your time. You are a genius!

[gits]

nope ;) ... but in case you have more questions just post back to the forum ;)

kind regards