HTML/CSS/JavaScript基础学习day03-作业

        var arr = [1, 2, 3, 4, 5];
        for (let i = 0; i < arr.length; i++) {
            console.log('数组的第' + parseInt(i + 1) + '个元素为：' + arr[i]);
        }

        var arr1 = [1, 2, 3, 4, 5];
        var arr2 = [];
        for (let i = 0; i < arr1.length; i++) {
            arr2[i] = arr1[i] + 1;
        }
        console.log('新的数组是：' + arr2);

        var arr3 = [1, 2, 3, 4, 5];
        let max = arr3[0];
        for (let i = 0; i < arr3.length; i++) {
            if (arr3[i] > max) {
                max = arr3[i];
            }
        }
        console.log('这个数组的最大值是：' + max);

        var arr4 = [1, 2, 3, 4, 5];
        let min = arr4[0];
        for (let i = 0; i < arr4.length; i++) {
            if (arr4[i] < min) {
                min = arr[i];
            }
        }
        console.log('这个数组的最小值是：' + min);

        var arr5 = [1, 2, 3, 4, 5];
        let sum = 0;
        for (let i = 0; i < arr5.length; i++) {
            sum = sum + arr5[i];
        }
        let avg = sum / arr5.length;
        console.log('这个数组的平均值是：' + avg);

        var arr6 = ['你好', ',', '月薪过万', '的', '帅哥美女们', '!'];
        let str = '';
        for (let i = 0; i < arr6.length; i++) {
            str = str + arr6[i];
        }
        console.log('组合出的句子是：' + str);

        var arr7 = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
        var arr8 = [];
        for(let i = 0; i < arr7.length; i++){
            if(arr7[i] % 2 == 0){
                arr8.push(arr7[i]);
            }
        }
        console.log('过滤出的新的偶数数组是：' + arr8);