Question

this is my code:

$(function() {
    $('input[name^=sum]').keyup(function() {
        var sum0 = parseFloat($('input[name=sum0]').val()) || 0;
        var sum1 = parseFloat($('input[name=sum1]').val()) || 0;
        $('#act_rate').val(sum1/sum0);
    });
});

This little script calculates the actual exchange rate from 2 input fields. I would like to display the act_rate with no more than 8 decimal places like 1.12345678. How can I format the outcome like that?

Many thanks for your help in advance.
Peter

Answer 1

Use the toFixed() method.

var num = (sum0) ? sum1/sum0 : 0; // don't divide by zero
$('#act_rate').val(num.toFixed(8));

Or, if you want 8 decimal places or less:

$('#act_rate').val(+num.toFixed(8));  // convert string into number

http://jsfiddle.net/mblase75/WNXSA/