modf

Get the integral and fractional parts of a given number, without loss of precision.

Install

npm install @lvlte/modf

Usage

Import :

// ESM
import { modf } from '@lvlte/modf';

Or

// CJS
const { modf } = require('@lvlte/modf');

Example :

const x = 1.3;

// We are used to :
console.log(Math.trunc(x));     // (integer part)     1
console.log(x - Math.trunc(x)); // (fractional part)  0.30000000000000004
console.log(x % 1);             // (fractional part)  0.30000000000000004

// But we can use modf() to avoid precision loss :
const [ipart, fpart] = modf(x);
console.log(ipart);             // (integer part)     1
console.log(fpart);             // (fractional part)  0.3