locutus/esm/php/math/atanh.js

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

export function atanh(arg) {
    //  discuss at: https://locutus.io/php/atanh/
    // original by: Onno Marsman (https://twitter.com/onnomarsman)
    //   example 1: atanh(0.3)
    //   returns 1: 0.3095196042031118
    return 0.5 * Math.log((1 + arg) / (1 - arg));
}