Nodejs Utililty Methods Number to Decimal Convert

Number.prototype.toDecimal = function(){
  if(this > 0){
    return this / 100;
  }else{
    return this * 1;
};

Number.prototype.toDecimal = function(value) { 
  var precision = 2; 
  var power     = Math.pow(10, precision || 0);
  return String(Math.round(value * power) / power);
};

Number.prototype.toDecimalPrecision = function(number_of_decimal_places) {
  var components = ("" + this).split('.')
  if (components[0] == undefined) components[0] = "0";
  if (components[1] == undefined) components[1] = "0";
  return components[0] + '.' + components[1].substr(0,number_of_decimal_places)

var k2c = k => k - 273.15
var k2r = k => k * 1.8
var k2f = k => k2r(k) - 459.67
Number.prototype.toMaxDecimal = function (d) {
  return +this.toFixed(d) + ''
function kCnv(k) {
  document.write( k,'K? = ', k2c(k).toMaxDecimal(2),'C? = ', k2r(k).toMaxDecimal(2),'R? = ', k2f(k).toMaxDecimal(2),'F?<br>' )
kCnv(21)
kCnv(295)

Number.prototype.toMaxFiexed = function (digits) {
  var ret = this.toFixed(digits);
  ret = ret.replace(/0+$/, '').replace(/\.$/, '');
  return ret;
function HTMLEncode (input) { 
  var converter = document.createElement("DIV"); 
  converter.innerText = input; 
  var output = converter.innerHTML; 
...

Number.prototype.toMillions = function() {
  return (this / 1000000).toFixed(1) + 'M';
};