round-decimal

Decimal rounding with ULP.

Warning
Work in process

Installation

npm install -D round-decimal

jsDelivr

Load roundDecimal from jsDelivr.

<script src="https://cdn.jsdelivr.net/npm/round-decimal"></script>

unpkg

Load roundDecimal from unpkg.

<script src="https://unpkg.com/round-decimal"></script>

Usage

Syntax

roundDecimal(value, minSignificantFractionDigits = 3)

Description

Decimal rounding with ULP.

Parameters

• value
  • A number.
• minSignificantFractionDigits
  • Minimum significant fraction digits.
  • Default: 3

Return value

The rounded value.

Examples

import roundDecimal from 'round-decimal';

console.log(0.1 + 0.2); // 0.30000000000000004
console.log(roundDecimal(0.1 + 0.2)); // 0.3

console.log(-0.1 - 0.2); // -0.30000000000000004
console.log(roundDecimal(-0.1 - 0.2)); // -0.3

console.log(10000000000.1 + 10000000000.2); // 20000000000.300003
console.log(roundDecimal(10000000000.1 + 10000000000.2)); // 20000000000.3
console.log(roundDecimal(10000000000.1 + 10000000000.2, 6)); // 20000000000.300003

console.log(10000000000000.1 + 10000000000000.2); // 20000000000000.297
console.log(roundDecimal(10000000000000.1 + 10000000000000.2)); // 20000000000000.297
console.log(roundDecimal(10000000000000.1 + 10000000000000.2, 2)); // 20000000000000.3

console.log(roundDecimal(1.3549999999999998)); // 1.355

Try it out on JSFiddle.

License

MIT