Rounding a float in JavaScript

Question

I have a floating point number in JavaScript, like 42.563134634634. I want to display it as a string "42.56", with exactly two decimal places. How do I do that?

Answer 1

Use toFixed method:

var num = 42.563134634634;
alert(num.toFixed(2));

Answer 2

You could do

var num = 42.563134634634;
var res = num.toFixed(2);