[프로그래머스] 가운데 글자 가져오기😄

https://programmers.co.kr/learn/courses/30/lessons/12903

function solution(s) {
    var answer = '';
    var len = s.length;
    if(len % 2 === 0){
        answer += s[len/2 - 1]
        answer += s[len/2]
    }else{
        answer += s[parseInt(len/2)];
    }
    
    return answer;
}