BJ_web_developers / dyitoc

  "use strict";
  
  var isNatural     = require("../number/is-natural")
    , toShortString = require("../to-short-string-representation");
  
  module.exports = function (arg) {
  	var num = Number(arg);
  	if (!isNatural(num)) throw new TypeError(toShortString(arg) + " is not a natural number");
  	return num;
  };