python pow function (31)

 

A function introduced .pow

    Built-in functions in python pow () There are two parameters, x and y, and returns xy (x power of y) values, the following syntax:

 

pow(x, y[, z])

 

   Parameter Description :

        x - values ​​are the expression (integer or floating point);

        y - numeric expression (integer or floating point);

        z - numeric expression (integer or floating point), does not set the default value of z;

    Return Value : returns the value xy (x power of y); and if the z value is set, then the result of the modulo, the result is equivalent to pow (x, y)% z ;

 

Function uses two .pow

    Case 1: pow function routine use

# ! Usr / bin / env Python 
# - * - Coding: UTF-8 _ * - 
"" " 
@author: Why grief 
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@file: python_pow.py 
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"" " 
Print (POW (2,5)) # is equivalent to 2 * 2 * 2 * 2 * 2 = 32 
Print (POW (2,3)) # is equivalent to 2 * 2 * 2 = . 8 
Print (POW (2,3,5)) # is equivalent to 2% * 2 * 2 =. 8. 5%. 3. 5 = 
Print (2 * 2 * 2. 5%)   # equivalent pow (2,3,5) = 3

 

    Output:

32
8
3
3

 

 

    Case 2: All parameters pow function must be a value type, not other types, otherwise an error TypeError

print(pow(2,'2'))

 

 

An exception:

Traceback (most recent call last):
  File "E:/Project/python_project/untitled10/123.py", line 18, in <module>
    print(pow(2,'2'))
TypeError: unsupported operand type(s) for ** or pow(): 'int' and 'str'

 

 

    Case 3: Ruoguo x, y has a float, the result is converted to floating point

 

print(pow(2,3.2))
print(pow(2,3.0))

 

 

    Output:

9.18958683997628
8.0

 

 

 

 

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    Reproduced please specify: ape say Python  »  Python POW function

 

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