How can I round down a number in Javascript?

Question

How can I round down a number in JavaScript?

math.round() doesn\'t work because it rounds it to the nearest decimal.

I\'m not sure if there is

Answer 1

You can try to use this function if you need to round down to a specific number of decimal places

function roundDown(number, decimals) {
    decimals = decimals || 0;
    return ( Math.floor( number * Math.pow(10, decimals) ) / Math.pow(10, decimals) );
}

examples

alert(roundDown(999.999999)); // 999
alert(roundDown(999.999999, 3)); // 999.999
alert(roundDown(999.999999, -1)); // 990