[프로그래머스-Level1] 핸드폰 번호 가리기

let phone_number = "027778888";


function solution(phone_number) {
    let answer = '';

    for (let i = 0; i < phone_number.length - 4; i++) {
        answer += '*';
    }
    answer += phone_number.slice(-4);

    return answer;
}

console.log(solution(phone_number));