Python: Mathematical Functions (math Module)

A Module is collection of functions, variables and classes etc.

math is a module that contains several functions to perform mathematical operations

If we want to use any module in Python, first we have to import that module.

import math

Once we import a module then we can call any function of that module.

import math
print(math.sqrt(16))
print(math.pi)

4.0
3.141592653589793

We can create alias name by using as keyword.

import math as m

Once we create alias name, by using that we can access functions and variables of that module

import math as m
print(m.sqrt(16))
print(m.pi)

We can import a particular member of a module explicitly as follows

from math import sqrt
from math import sqrt,pi

If we import a member explicitly then it is not required to use module name while accessing.

from math import sqrt,pi
print(sqrt(16))
print(pi)
print(math.pi) => NameError: name 'math' is not defined

important functions of math module:

ceil(x)
floor(x)
pow(x,y)
factorial(x)
trunc(x)
gcd(x,y)
sin(x)
cos(x)
tan(x)

important variables of math module:

pi3.14
e===>2.71
inf ==>infinity
nan ==>not a number

Q. Write a Python program to find area of circle

pi*r**2

from math import pi
r=16
print("Area of Circle is :",pi*r**2)

Output: Area of Circle is : 804.247719318987

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