百分号在Python中是什么意思 [英] What does the percentage sign mean in Python

问题描述

在本教程中，有一个查找素数的示例:

In the tutorial there is an example for finding prime numbers:

>>> for n in range(2, 10):
...     for x in range(2, n):
...         if n % x == 0:
...             print(n, 'equals', x, '*', n//x)
...             break
...     else:
...         # loop fell through without finding a factor
...         print(n, 'is a prime number')
...

我知道双精度==是对相等性的检验，但我不理解if n % x部分.就像我可以口头遍历每个部分，并说出该语句对示例的作用.但是我不明白百分号是如何下降的.

I understand that the double == is a test for equality, but I don't understand the if n % x part. Like I can verbally walk through each part and say what the statement does for the example. But I don't understand how the percentage sign falls in.

if n % x实际怎么说?

推荐答案

模运算符；给出剩余的左值除以右值.喜欢:

Modulus operator; gives the remainder of the left value divided by the right value. Like:

3 % 1等于零(因为3被1除以均分)

3 % 1 would equal zero (since 3 divides evenly by 1)

3 % 2等于1(因为3除以2会得到1的余数).

3 % 2 would equal 1 (since dividing 3 by 2 results in a remainder of 1).

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