Roman Numeral Converter

将给定的数字转换成罗马数字。

所有返回的 罗马数字 都应该是大写形式。

这是一些对你有帮助的资源:

• Roman Numerals

• Array.splice()

• Array.indexOf()

• Array.join()

function convertToRoman(num) {
  var nums =[1000,900,500,400,100,90,50,40, 10, 9, 5, 4, 3, 2, 1];
  var romans = ["M","CM","D","CD","C","XC","L","XL","X","IX","V","IV","III","II", "I"];
  var result ='';
  nums.forEach((item,index)=>{
    while(item<=num){
      result += romans[index];
      num -= nums[index];
    }
  })
 return result;
}