Python, as well as most other programming languages, comes with a standard library of functions that have already been written( known as library functions ). Many of the functions in the standard library, however, are stored in files that are known as modules. These modules, which are copied to your computer when you install Python, help organize the standard library functions.
In
order to call a function that is stored in a module, you have to write an
import statement at the top of your program. An import statement tells the
interpreter the name of the module that contains the function.
Ex:
import
math
The
math module contains various mathematical functions that work with
floatingpoint numbers.
Ø The
math Module
The
math module in the Python standard library contains several functions that are
useful for performing mathematical operations. These functions typically accept
one or more values as arguments, perform a mathematical operation using the
arguments, and return the result.
The
math module also defines two variables, pi and e, which are assigned
mathematical values for pi and e. These variables can be used in
equations that require their values.
Example:
area
= math.pi * radius**2