Python|十进制 log10() 方法

Decimal#log10() : log10()是一个 Decimal 类方法，它返回 Decimal 值的以十为底的对数。

Syntax: Decimal.log10()

Parameter: Decimal values

Return: the base ten logarithm of the Decimal value.

代码 #1：log10() 方法的示例

# Python Program explaining 
# log10() method
  
# loading decimal library
from decimal import *
  
  
# Initializing a decimal value
a = Decimal('.9932')
  
b = Decimal('0.142857')
  
# printing Decimal values
print ("Decimal value a : ", a)
print ("Decimal value b : ", b)
  
  
# Using Decimal.log10() method
print ("\n\nDecimal a with log10() method : ", a.log10())
  
print ("Decimal b with log10() method : ", b.log10())

输出 ：

Decimal value a :  0.9932
Decimal value b :  0.142857


Decimal a with log10() method :  -0.002963289117473302730973454338
Decimal b with log10() method :  -0.8450984743089558813497604715

代码 #2：log10() 方法的示例

# Python Program explaining 
# log10() method
  
# loading decimal library
from decimal import *
  
  
# Initializing a decimal value
a = Decimal('3.14')
  
b = Decimal('321e + 5')
  
# printing Decimal values
print ("Decimal value a : ", a)
print ("Decimal value b : ", b)
  
  
# Using Decimal.log10() method
print ("\n\nDecimal a with log10() method : ", a.log10())
  
print ("Decimal b with log10() method : ", b.log10())

输出 ：

Decimal value a :  3.14
Decimal value b :  3.21E+7


Decimal a with log10() method :  0.4969296480732149319752200246
Decimal b with log10() method :  7.506505032404872078129569143