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)) ` |

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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) ` |

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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"` `) ` |

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Output:

The number is nan The number is positive infinity

This article is contributed by **Manjeet Singh**. If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

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