TIL: Quick rounding in JS

In the past I’d always used the Math.round() function with floor and such to handle rounding to decimal places, turns out there’s a much simpler way of doing it…

To round to say 3 decimal places, just use the toFixed() method that’s available to any Number. For example:

a = 12.34567

The above will return 12.346, where the method automatically rounds up the value for you.

This is much shorter than the way I’d been doing the math in the past.