[프로그래머스] 핸드폰 번호 가리기🤣
https://programmers.co.kr/learn/courses/30/lessons/12948
function solution(phone_number) {
var answer = '';
var len = phone_number.length
for(let i = 0; i < len; i++){
if(len === 4)
answer += phone_number[i];
else if(i < len-4)
answer += '*';
else
answer += phone_number[i]
}
return answer;
}
replace 내장함수를 써서 해보자