js-循环加属猪案例

 /*利用循环遍历数组*/
        var arr = [1,2,3,4,5]
        for(var i = 0;i<arr.length;i++){
            console.log(arr[i]);
        }

        /*数组案例——求所有元素的和*/
        var arr1 = [1,2,3,4,5],sum=0;
        for(var i = 0;i<arr1.length;i++){
            sum += arr1[i];
        }
        console.log(sum);

        /*求数组中的最大值*/
        var arr2 = [1,2,3,4,5,10],max = arr2[0];
        for(var i = 1;i<arr2.length;i++){
            if(arr2[i]>max){
                max = arr2[i];
            }
        }
        console.log(max);
        /*最小值与上面相似*/

        /*倒叙遍历数组*/
        var arr3 = [1,2,3,4,5,6];
        for(var i = arr3.length-1;i >= 0;i--){
            console.log(arr3[i]);
        }

        /*字符转拼接*/
        var arr4 = [‘李小龙‘,‘叶问‘,‘黄飞鸿‘];
        var str = ‘‘;
        for(var i = 0; i<arr4.length-1;i++){
            str += arr4[i]+‘||‘;
        }
        console.log(str+arr4[arr4.length-1]);

        /*去除数组中的0*/
            var arr6 = [2, 0, 5, 0, 7, 3, 0, 4];
            //新数组
            var t = [];
            for(var i = 0; i < arr6.length; i++) {
                if(arr6[i] != 0) {
                    //                    console.log(arr6[i]);
                    //插入新数组
                    t[t.length] = arr6[i];
                }
            }
            console.log(t);