29 lines
1.0 KiB
Markdown
29 lines
1.0 KiB
Markdown
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---
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title: Python Abs Function
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localeTitle: Python Abs函数
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---
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`abs()`是Python 3中的内置函数,用于计算任何数字的绝对值。数字的绝对值“仅表示数字与0之间的距离” 1它需要一个参数`x` 。参数甚至可以是一个[复数](https://docs.python.org/3.0/library/cmath.html) ,在这种情况下,它的[模数](http://www.mathcentre.ac.uk/resources/sigma%20complex%20number%20leaflets/sigma-complex9-2009-1.pdf)被返回。
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## 论据
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它需要一个参数`x` - 一个整数,或十进制,或一个复数。
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## 回报价值
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返回值为正数。即使传递了复数,也会返回其大小,按复数代数计算。
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## 代码示例
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```python
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print(abs(3.4)) # prints 3.4
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print(abs(-6)) # prints 6
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print(abs(3 + 4j)) # prints 5, because |3 + 4j| = 5
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```
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[🚀运行代码](https://repl.it/CL8k/0)
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[官方文件](https://docs.python.org/3/library/functions.html#abs)
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### 来源
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1. [数学很有趣。访问时间:2017年10月25日](https://www.mathsisfun.com/numbers/absolute-value.html)
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