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Python math library | exp() method
  • Last Updated : 06 Jan, 2019
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Python has math library and has many functions regarding it. One such function is exp(). This method is used to calculate the power of e i.e. e^y or we can say exponential of y. The value of e is approximately equal to 2.71828…..

Syntax : math.exp(y)

Parameters :
y [Required] – It is any valid python number either positive or negative.
Note that if y has value other than number then its return error.

Returns: Returns floating point number by calculating e^y.

Code # 1:






# Python3 code to demonstrate 
# the working of exp() 
import math 
  
# initializing the value 
test_int = 4
test_neg_int = -3
test_float = 0.00
  
# checking exp() values 
# with different numbers
print (math.exp(test_int))
print (math.exp(test_neg_int))
print (math.exp(test_float))
Output:
54.598150033144236
0.049787068367863944
1.0

 

Code #2:




# Python3 code to demonstrate 
# the working of exp() 
import math 
  
# checking exp() values 
# with inbuilt numbers
print (math.exp(math.pi))
print (math.exp(math.e))
Output:
23.140692632779267
15.154262241479262

 
Code #3: TypeError




# Python3 code to demonstrate 
# the working of exp() 
import math 
  
# checking for string
print (math.exp("25"))

Output:

Traceback (most recent call last):
  File "/home/c7ae4f1bef0ed8c7756b3f55e7d2ce81.py", line 6, in 
    print (math.exp("25"))
TypeError: a float is required

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