英文:
Interpret one Python function
问题
能否请您帮忙解释这个函数的含义以及如何使用它？谢谢。
def isNaN(num):
return num != num
英文:
Could you please help me to interpret the meaning of this function, and the way to use it? Thank you.
def isNaN(num):
return num != num
答案1
得分: 1
"NaN"代表不是一个数字。它是数值数据类型的一个成员，表示一个不可预测的值。例如，负数的平方根是NaN，无限大的数减去另一个无限大的数也是NaN。所以基本上，NaN表示计算系统中的未定义值。您可以使用它来检查计算结果，进行调试...基本上，任何您想要查看是否无法解析为数字的情况。
英文:
> ...Nan stands for Not a Number. It is a member of the numeric data type
> that represents an unpredictable value. For example, Square root of a
> negative number is a NaN, Subtraction of an infinite number from
> another infinite number is also a NaN. so basically, NaN represents an
> undefined value in a computing system.
You could use it to check the results of calculations, to debug... basically anything you want to see if it cannot be resolved to a number.
通过集体智慧和协作来改善编程学习和解决问题的方式。致力于成为全球开发者共同参与的知识库，让每个人都能够通过互相帮助和分享经验来进步。
评论