给定campgrounds数组，编写一个函数，返回一个sum和匹配的输入字符串

function findMatchSum(campgrounds, inputString) {
    let sum = 0;
    let match = false;

    // 遍历campgrounds数组
    for (let i = 0; i < campgrounds.length; i++) {
        // 判断当前元素是否与输入字符串匹配
        if (campgrounds[i] === inputString) {
            match = true;
            // 将当前元素的下标与1相加，作为sum的值
            sum = i + 1;
            break;
        }
    }

    // 返回匹配结果
    return {
        sum: sum,
        match: match
    };
}

const campgrounds = ["abc", "def", "ghi"];
const inputString = "def";

{
    sum: 2,
    match: true
}

{
    sum: 0,
    match: false
}