함수 형식Num(num)
{
if(!/^( |-)?(d )(.d )?$/.test(num)){alert("wrong!"); return num;}
var a = RegExp. $1, b = RegExp.$2, c = RegExp.$3;
var re = new RegExp().compile("(\d)(\d{3})(,|$)"); while(re .test(b)) b = b.replace(re, "$1,$2$3")
return a "" b "" c;
}
![[웹 프런트엔드] Node.js 빠른 시작](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
