Decimal＃exp()：exp()是一个Decimal类方法，该方法以给定的数字返回(自然)指数函数e ** x的值
用法：Decimal.exp()
参数：十进制值
返回：给定数字的(自然)指数函数e ** x的值
代码1：exp()方法示例
# Python Program explaining
# exp() 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.exp() method
print ("\n\nDecimal a with exp() method : ", a.exp())
print ("Decimal b with exp() method : ", b.exp())
输出：
Decimal value a : -1
Decimal value b : 0.142857
Decimal a with exp() method : 0.3678794411714423215955237702
Decimal b with exp() method : 1.153564830100120253802476512
代码2：exp()方法的示例
# Python Program explaining
# exp() method
# loading decimal library
from decimal import *
# Initializing a decimal value
a = Decimal('-3.14')
b = Decimal('7.555')
# printing Decimal values
print ("Decimal value a : ", a)
print ("Decimal value b : ", b)
# Using Decimal.exp() method
print ("\n\nDecimal a with exp() method : ", a.exp())
print ("Decimal b with exp() method : ", b.exp())
输出：
Decimal value a : -3.14
Decimal value b : 7.555
Decimal a with exp() method : 0.04328279790196590079772976615
Decimal b with exp() method : 1910.270243928773816178935745
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