Python | Decimal logb()方法
原文:https://www.geeksforgeeks.org/python-decimal-logb-method/
Decimal#logb() : logb() 是 Decimal 类方法，返回 Decimal 值的调整指数。
Syntax:
Decimal.logb()
Parameter:
Decimal values
Return:
the adjusted exponent of the Decimal value.
代码# 1:logb()方法示例
# Python Program explaining
# logb() 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.logb() method
print ("\n\nDecimal a with logb() method : ", a.logb())
print ("Decimal b with logb() method : ", b.logb())
输出:
Decimal value a : 0.9932
Decimal value b : 0.142857
Decimal a with logb() method : -1
Decimal b with logb() method : -1
代码# 2:logb()方法示例
# Python Program explaining
# logb() 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.logb() method
print ("\n\nDecimal a with logb() method : ", a.logb())
print ("Decimal b with logb() method : ", b.logb())
输出:
Decimal value a : 3.14
Decimal value b : 3.21E+7
Decimal a with logb() method : 0
Decimal b with logb() method : 7
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