奇偶索引差异 - JavaScript

javascriptweb developmentfront end technologyobject oriented programming更新于 2025/12/12 17:16:17

我们需要编写一个 JavaScript 函数，该函数接受一个数字数组，例如 −

const arr = [3, 6, 34, 12, 6, 8, 8, 5, 6, 8];

该函数应返回奇数索引处元素总和与偶数索引处元素总和之间的差值

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));