프로그래머스 - 가운데글자가져오기

const getCenter = str => {
    const strArr = [...str];
    let answer = "";
    let center = (strArr.length - 1) / 2;
    let end = strArr.length % 2 > 0 ? center + 1 : center + 2;
    const answerArr = strArr.slice(center, end);
    for (let value of answerArr) answer += value;
    return answer;
};

test("가운데글자구하기", () => {
    expect(getCenter("abcdd")).toBe("c");
});