locutus/php/math/expm1.js

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

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.expm1 = expm1;
function expm1(x) {
    //      discuss at: https://locutus.io/php/expm1/
    // parity verified: PHP 8.3
    //     original by: Brett Zamir (https://brett-zamir.me)
    //     improved by: Robert Eisele (https://www.xarg.org/)
    //          note 1: Precision 'n' can be adjusted as desired
    //       example 1: expm1(1e-15)
    //       returns 1: 1.0000000000000007e-15
    return x < 1e-5 && x > -1e-5 ? x + 0.5 * x * x : Math.exp(x) - 1;
}