数组中的最大值和最小值

   var arr = [12, 56, 25, 5, 82, 51, 22];
        var max = arr[0];
        var min = arr[0];
        for (var i = 1; i < arr.length; i++) {
            if (arr[i] > max) {
                max = arr[i];
            }
            if (arr[i] < min) {
                min = arr[i];
            }
        }
        console.log("最大值是：" + max);
        console.log("最小值是：" + min);