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Mathematical Functions in Python | Set 4 (Special Functions and Constants)

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Some of the mathematical functions are discussed in below set 1, set 2 and set 3 Mathematical Functions in Python | Set 1 (Numeric Functions) Mathematical Functions in Python | Set 2 (Logarithmic and Power Functions) Mathematical Functions in Python | Set 3 (Trigonometric and Angular Functions) Special Functions and constants are discussed in this article. 1. gamma() :- This function is used to return the gamma function of the argument.
# Python code to demonstrate the working of
# gamma()
   
# importing "math" for mathematical operations
import math
  
a = 4
  
# returning the gamma() of 4
print ("The gamma() of 4 is : ", end="")
print (math.gamma(a))

                    
Output:
The gamma() of 4 is : 6.0

2. pi :- This is an inbuilt constant that outputs the value of pi(3.141592). 3. e :- This is an inbuilt constant that outputs the value of e(2.718281).
# Python code to demonstrate the working of
# const. pi and e
   
# importing "math" for mathematical operations
import math
  
# returning the value of const. pi
print ("The value of const. pi is : ", end="")
print (math.pi)
  
# returning the value of const. e
print ("The value of const. e is : ", end="")
print (math.e)

                    
Output:
The value of const. pi is : 3.141592653589793
The value of const. e is : 2.718281828459045

4. inf :- This is a positive floating point infinity constant. -inf is used to denote the negative floating point infinity. This constant is defined in python 3.5 and above. 5. isinf() :- This function is used to check whether the value is an infinity or not. 6. nan :- This constant denotes “Not a number” in python. This constant is defined in python 3.5 and above. 7. isnan() :- This function returns true if the number is “nan” else returns false.
# Python code to demonstrate the working of
# inf, nan, isinf(), isnan()
   
# importing "math" for mathematical operations
import math
  
# checking if number is nan
if (math.isnan(math.nan)):
       print ("The number is nan")
else : print ("The number is not nan")
  
# checking if number is positive infinity
if (math.isinf(math.inf)):
       print ("The number is positive infinity")
else : print ("The number is not positive infinity")

                    
Output:
The number is nan
The number is positive infinity


Last Updated : 29 Jul, 2016
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