Round to X number of decimals, using Javascript

[DusX]

I was just answering a support request, where I sent the user a piece of Javascript code I use...

and thought that I should share it here:

It takes in a float and outputs it rounded to the number of decimals set in the second input.


//input 1 = the float val
//input 2 = the number of decimal places to round [0-4]  MUST BE INT

function main()
{
	function Nrnd(num, places){ 
		return +(Math.round(num + "e+" + places) + "e-" + places);
	}

	R = Nrnd(arguments[0],arguments[1]);
	return R;
}