Keep the evens · 只留下偶数
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Python Basics · Python 基础 · Functions · 函数 →
English
Keep the evens
Filter a list: keep some items and leave the rest out.
Start with an empty list, loop over nums, and .append() each number that passes the test n % 2 == 0. Return the new list after the loop has finished.
中文
只留下偶数
筛选列表：保留一部分元素，去掉其余的。
先建一个空列表，遍历 nums，把通过 n % 2 == 0 判断的数用 .append() 加进去。循环结束后返回这个新列表。
Write evens(nums) that returns a new · 新的 list holding only the even numbers from nums, in the same order. · 编写 evens(nums)，返回一个新列表，只包含 nums 中的偶数，顺序不变。
Click Run to see the output here. · 点击“运行”查看此处输出。