Python Decimal next_minus()用法及代码示例

Decimal＃next_minus()：next_minus()是Decimal类方法，它返回小于Decimal值的最大可表示数字。

用法： Decimal.next_minus()

参数：十进制值

返回：小于十进制值的最大可表示数字。

代码1：next_minus()方法示例

# Python Program explaining  
# next_minus() method 
  
# loading decimal library 
from decimal import *
  
  
# Initializing a decimal value 
a = Decimal(-1) 
  
b = Decimal('0.142857') 
  
# printing Decimal values 
print ("Decimal value a : ", a) 
print ("Decimal value b : ", b) 
  
  
# Using Decimal.next_minus() method 
print ("\n\nDecimal a with next_minus() method : ", a.next_minus()) 
  
print ("Decimal a with next_minus() method : ", a.next_minus()) 
  
print ("Decimal b with next_minus() method : ", b.next_minus())

输出：

Decimal value a :  -1
Decimal value b :  0.142857


Decimal a with next_minus() method :  -1.000000000000000000000000001
Decimal a with next_minus() method :  -1.000000000000000000000000001
Decimal b with next_minus() method :  0.1428569999999999999999999999

代码2：next_minus()方法的示例

# Python Program explaining  
# next_minus() 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.next_minus() method 
print ("\n\nDecimal a with next_minus() method : ", a.next_minus()) 
  
print ("Decimal a with next_minus() method : ", a.next_minus()) 
  
print ("Decimal b with next_minus() method : ", b.next_minus())

输出：

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


Decimal a with next_minus() method :  -3.140000000000000000000000001
Decimal a with next_minus() method :  -3.140000000000000000000000001
Decimal b with next_minus() method :  32099999.99999999999999999999

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