如何用 Python 的“范围"按二数计算 [英] How to count by twos with Python's 'range'

问题描述

想象一下，我想遍历一个从 0 到 100 的循环，但跳过奇数(所以要两个两个").

So imagine I want to go over a loop from 0 to 100, but skipping the odd numbers (so going "two by two").

for x in range(0,100):
    if x%2 == 0:
        print x

这解决了它.但是想象一下，我想要跳两个数字吗?那么三个呢?没有办法吗?

This fixes it. But imagine I want to do so jumping two numbers? And what about three? Isn't there a way?

推荐答案

使用 step 参数(最后一个，可选):

Use the step argument (the last, optional):

for x in range(0, 100, 2):
    print(x)

注意，如果你真的想保留奇数，它会变成:

Note that if you actually want to keep the odd numbers, it becomes:

for x in range(1, 100, 2):
    print(x)

Range 是一个非常 强大 功能.

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