#221 Iterate Through an Array with a For Loop

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#221 Iterate Through an Array with a For Loop

迭代输出一个数组的每个元素是 JavaScript 中的常见需求, for 循环可以做到这一点. 下面的代码将输出数组 arr 的每个元素到控制台: var arr = [10,9,8,7,6];for (var i=0; i < arr.length; i++) { console.log(arr[i]);} 记住数组的索引从零开始的,这意味着数组的最后一个元素的下标是:数组的长度 - 1.我们这个循环的条件是 i < arr.length,当 i 的值为长度-1 的时候循环就停止了.…

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