Nodejs Utililty Methods Array to Twenty Convert

Array.prototype.toTwenty = function() {
  for (var i = 1; i < 21; i++) {
    this.push(i);
  return this;
},

Array.prototype.toTwenty = function(){
    var start = 1;
    var end = 20;
    for(var i = start; i <= end; i += 1){
        this.push(i);
   return this;
var oneToTwenty = [].toTwenty(); */
...

Array.prototype.toTwenty = function(){
    var start = 1;
    var end = 20;
    for(var i = start; i <= end; i += 1){
        this.push(i);
   return this;
Array.prototype.toForty = function(){
...

Array.prototype.toTwenty = function() {
  return Array.range(20, 1);
};

Array.prototype.toTwenty = function(){
  a = 1;
  b = [];
  for(i=1; i<=20; i++){
    b.push(i);
  return b

'use strict';
Array.prototype.toTwenty = function() {
  let arr = [];
  for (var i = 1; i <= 20; i++) {
    arr.push(i);
  return arr;
Array.prototype.toForty = function() {
...

Array.prototype.toTwenty = function(){
  for(var loop =1; loop<=20;loop++){
    this.push(loop);
  return this;
};
Array.prototype.toForty = function(){
  for(var loop = 1;loop<=20;loop++){
    this.push(loop*2);
...

Array.prototype.toTwenty = function() {
    var arr = [];
    for (i = 0; i < 20; i++) {
        arr.push(i+1);
    return arr;
Array.prototype.toForty = function() {
    var arr = [];
...

Array.prototype.toTwenty = function(){
  var twenty = [];
  for ( var i = 1; i <= 20; i++){
    twenty.push(i)
      return twenty
Array.prototype.toForty = function() {
  var forty = [];
...

Array.prototype.toTwenty = function() {
  for(let i=1; i<=20; i++) {
    this.push(i);
  return this;
Array.prototype.toForty = function() {
  for(let i=2; i<=40; i+=2) {
    this.push(i);
...