數值運算常用函式

1. abs 函式計算絕對值。

   pyuser@deyu:~/zzz$ python
   Python 3.12.9 (main, Aug 14 2025, 00:00:00) [GCC 14.2.1 20250110 (Red Hat 14.2.1-7)] on linux
   Type "help", "copyright", "credits" or "license" for more information.
   >>> x=-5.2
   >>> y=2.3
   >>> print(abs(x),abs(y))
   5.2 2.3
   

2. pow(x,y) 函式計算 x 的 y 次方。

   >>> x=2
   >>> y=3.1
   >>> print(pow(x,y))
   8.574187700290345
   

3. round(x) 函式取 x 的「四捨五入」值，回傳整數。

   >>> x=3.5
   >>> y=2.4
   >>> print(round(x),round(y))
   4 2
   >>> print(type(round(x)),type(round(y)))
   <class 'int'> <class 'int'>
   >>> quit()