Numbers to Words

numbers-to-words.js

const names  = [{'0':'zero','1':'one','2':'two','3':'three','4':'four','5':'five','6':'six','7':'seven','8':'eight','9':'nine' },{'0':'ten','1':'eleven','2':'twelve','3':'thirteen','4':'fourteen','5':'fifteen','6':'sixteen','7':'seventeen','8':'eighteen','9':'nineteen'},{'2':'twenty','3':'thirty','4':'forty','5':'fifty','6':'sixty','7':'seventy','8':'eighty','9':'ninety'},['','thousand','million','billion','trillion','quadrillion','quintillion','sextillion','septillion','octillion','nonillion','decillion','undecillion','duodecillion','t#000ecillion','quattuordecillion', 'quindecillion','sexdecillion','septdecillion','octdecillion','novemdecillion','vigintillion']];
let to_words = (s) => {
    n = 0;
    s = '' + s.split('').reverse();
    var ns = s.slice(0, 3);
    return (ns.length < 1)?'':to_words(s.slice(3,s.length),n+1)+((ns.length>1)?((ns.length==3&&ns[2]!='0')?names[0][ns[2]]+' hundred '+((ns[1]=='1')?names[1][ns[0]]+' ':(ns[1]!='0')?names[2][ns[1]]+' '+((ns[0]!='0')?names[0][ns[0]]+' ':''):(ns[0]!='0'?names[0][ns[0]]+' ':'')):((ns[1]=='1')?names[1][ns[0]]+' ':(ns[1]!='0')?names[2][ns[1]]+' '+((ns[0]!='0')?names[0][ns[0]]+' ':''):(ns[0]!='0'?names[0][ns[0]]+' ':''))) + (((ns.length==3&&(ns[0]!='0'||ns[1]!='0'||ns[2]!='0'))||(ns.length==2&&(ns[0]!='0'||ns[1]!='0'))||(ns.length==1&&ns[0]!='0'))?names[3][n]+' ':''):((ns.length==1&&ns[0]!='0')?names[0][ns[0]]+' ':'') + (((ns.length==3&&(ns[0]!='0'||ns[1]!='0'||ns[2]!='0'))||(ns.length==2&&(ns[0]!='0'||ns[1]!='0'))||(ns.length==1&&ns[0]!='0'))?names[3][n]+' ':''));
}