locutus/r/base/round.js

Locutus other languages' standard libraries to JavaScript for fun and educational purposes

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.round = round;
function round(x, digits) {
    //      discuss at: https://locutus.io/r/round/
    // parity verified: R 4.4
    //     original by: Kevin van Zonneveld (https://kvz.io)
    //       example 1: round(3.14159)
    //       returns 1: 3
    //       example 2: round(3.14159, 2)
    //       returns 2: 3.14
    if (digits === undefined || digits === 0) {
        return Math.round(x);
    }
    const factor = Math.pow(10, digits);
    return Math.round(x * factor) / factor;
}