rou/front-end-example

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charlie 877acb5a8f feat: Add JavaScript core exercises and solutions

- Implemented exercises for array high-order methods, memory and execution, switch statements, and final review.
- Added starter and answer files for each exercise to facilitate learning.
- Created a runner HTML file to execute JavaScript code and display console outputs.
- Updated README files to include exercise objectives, tasks, and usage instructions.

2026-03-13 11:09:19 +08:00

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练习 4：循环

目标

学会用循环处理重复任务，而不是手写很多遍。

你要练什么

for
while
累加
条件跳过

任务

请完成一个“学习打卡统计”脚本，要求：

用 for 输出第 1 天到第 7 天的打卡信息
跳过第 4 天
再用 while 计算 1 到 5 的总和
输出最终总和

文件