Round off to the nearest 10 000 Javascript

Question

I have two variables one for decimal numbers and one for integer. Now, i add the decimal numbers with each other and the integers with each other then multiply the sum of decimal numbers and the sum of the integers. My problem now is i want to round them off to the nearest 10 000

So, if 2,54 * 40 000 = 101600 i want my div to display 110 000. Is this possible? I never know what the sum of the decimal numbers or the integers are, i just use two variables

Answer 1

Math.round(101600 / 10000) * 10000 // --> 100000
Math.floor(101600 / 10000) * 10000 // --> 100000
Math.ceil(101600 / 10000) * 10000 // --> 110000

Answer 2

var round = 10000;
var result = round * Math.round(answer / round);

Answer 3

Had to do this recently. Here is a function I wrote to do this automatically.

function getRoundedZeros(value, up){
        var roundto = '1';

        for(i = 1;i < value.toString().length; i++){
            roundto = roundto.concat('0');
        }

        roundto = parseInt(roundto);

        if(up === true){
            return Math.ceil(value / roundto) * roundto;
        }else{
            return Math.floor(value / roundto) * roundto;
        }
    }

    rounded = getRoundedZeros(UNrounded, true);

I hope it helps someone :)