奇数偶数索引差-JavaScript
我们需要编写一个JavaScript函数,该函数需要一个数字数组,如下所示:
const arr = [3, 6, 34, 12, 6, 8, 8, 5, 6, 8];
函数应返回出现在奇数索引处的元素之和与出现在偶数索引处的元素之和之间的差
示例
以下是代码-
const arr = [3, 6, 34, 12, 6, 8, 8, 5, 6, 8]; const oddEvenDiff = arr => { let diff = 0; for(let i = 0; i < arr.length; i++){ if(i % 2 === 0){ diff += arr[i]; }else{ diff -= arr[i] }; }; return Math.abs(diff); }; console.log(oddEvenDiff(arr));
输出结果
这将在控制台中产生以下输出-
18