var array = [1, 20, 12, 17]; var max = 0; var min = 100; for (var i = 0; i < array.length; i++) { if (max < array[i]) { max = array[i]; } if (array[i] < min) { min = array[i]; } } console.log("最高:" + max); console.log("最低:" + min); 関…