数目字转罗马数字

数字转罗马数字
function convert(num) {

var nums = [1000,900,500,400,100,90,50,40,10,9,5,4,1];
var romans =["m","cm","d","cd","c","xc","l","xl","x","ix","v","iv","i"];
var str = '';
nums.forEach(function(item,index,array){
while(num >= item){
str += romans[index];
num -= item;
}
});

return str.toUpperCase();
}

convert(36);