Python | Decimal log10()方法
原文:https://www.geeksforgeeks.org/python-decimal-log10-method/
Decimal#log10() : log10() 是一个 Decimal 类方法，返回 Decimal 值的以十为底的对数。
语法: Decimal.log10()
参数:十进制值
返回:十进制值的以十为底的对数。
代码# 1:log 10()方法示例
# 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:log 10()方法示例
# 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
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