Python math library | exp() method

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.

Time Complexity: O(1)
Auxiliary Space: O(1)

Code # 1:

python3

# 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

# 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

# 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