4 examples of 'javascript division round up' in JavaScript

11
function roundOne(decimalNumber) {
12
  return roundTo(decimalNumber, 1);
13
}

2527
BN.prototype.divRound = function divRound (num) {
2528
  var dm = this.divmod(num);
2529
2530
  // Fast case - exact division
2531
  if (dm.mod.isZero()) return dm.div;
2532
2533
  var mod = dm.div.negative !== 0 ? dm.mod.isub(num) : dm.mod;
2534
2535
  var half = num.ushrn(1);
2536
  var r2 = num.andln(1);
2537
  var cmp = mod.cmp(half);
2538
2539
  // Round down
2540
  if (cmp < 0 || (r2 === 1 && cmp === 0)) return dm.div;
2541
2542
  // Round up
2543
  return dm.div.negative !== 0 ? dm.div.isubn(1) : dm.div.iaddn(1);
2544
};

61
export function roundDown(
62
  value: BigNumber.Value,
63
  decimals: number = 2,
64
  roundingTolerance: number = 0
65
): BigNumber {
66
  if (roundingTolerance) {
67
    value = new BigNumber(value).decimalPlaces(
68
      decimals + roundingTolerance,
69
      BigNumber.ROUND_HALF_DOWN
70
    )
71
  }
72
  return new BigNumber(value).decimalPlaces(decimals, BigNumber.ROUND_DOWN)
73
}

4
function round(v, n) {
5
	return +(Math.round(v + 'e+' + n) + 'e-' + n);
6
}